Add a more descriptive example to Index Template
Add a more descriptive example to Index Template

Closes #17513
The current example in the documentation for Index Templates lacks any properties values. This is helpful to many devs that aren't sure how to take a regular Index Mapping and convert it to a template.

dpursehouse/elasticsearch,robin13/elasticsearch,mohit/elasticsearch,obourgain/elasticsearch,rajanm/elasticsearch,C-Bish/elasticsearch,nilabhsagar/elasticsearch,pozhidaevak/elasticsearch,lks21c/elasticsearch,MaineC/elasticsearch,i-am-Nathan/elasticsearch,JervyShi/elasticsearch,markwalkom/elasticsearch,strapdata/elassandra,naveenhooda2000/elasticsearch,myelin/elasticsearch,wangtuo/elasticsearch,yanjunh/elasticsearch,ThiagoGarciaAlves/elasticsearch,winstonewert/elasticsearch,gingerwizard/elasticsearch,rlugojr/elasticsearch,xuzha/elasticsearch,mikemccand/elasticsearch,jprante/elasticsearch,lks21c/elasticsearch,girirajsharma/elasticsearch,yynil/elasticsearch,gingerwizard/elasticsearch,artnowo/elasticsearch,JSCooke/elasticsearch,mikemccand/elasticsearch,MaineC/elasticsearch,spiegela/elasticsearch,bawse/elasticsearch,njlawton/elasticsearch,fred84/elasticsearch,StefanGor/elasticsearch,palecur/elasticsearch,trangvh/elasticsearch,trangvh/elasticsearch,jimczi/elasticsearch,mjason3/elasticsearch,sreeramjayan/elasticsearch,HonzaKral/elasticsearch,dongjoon-hyun/elasticsearch,wuranbo/elasticsearch,ThiagoGarciaAlves/elasticsearch,vroyer/elassandra,IanvsPoplicola/elasticsearch,gmarz/elasticsearch,liweinan0423/elasticsearch,mohit/elasticsearch,yynil/elasticsearch,mmaracic/elasticsearch,geidies/elasticsearch,uschindler/elasticsearch,mikemccand/elasticsearch,Stacey-Gammon/elasticsearch,yynil/elasticsearch,fforbeck/elasticsearch,LewayneNaidoo/elasticsearch,JackyMai/elasticsearch,vroyer/elassandra,mohit/elasticsearch,nknize/elasticsearch,strapdata/elassandra5-rc,JackyMai/elasticsearch,girirajsharma/elasticsearch,gfyoung/elasticsearch,wangtuo/elasticsearch,GlenRSmith/elasticsearch,LewayneNaidoo/elasticsearch,robin13/elasticsearch,geidies/elasticsearch,brandonkearby/elasticsearch,LeoYao/elasticsearch,glefloch/elasticsearch,lks21c/elasticsearch,a2lin/elasticsearch,spiegela/elasticsearch,sreeramjayan/elasticsearch,masaruh/elasticsearch,mikemccand/elasticsearch,uschindler/elasticsearch,s1monw/elasticsearch,qwerty4030/elasticsearch,camilojd/elasticsearch,glefloch/elasticsearch,liweinan0423/elasticsearch,scorpionvicky/elasticsearch,nazarewk/elasticsearch,dpursehouse/elasticsearch,girirajsharma/elasticsearch,myelin/elasticsearch,IanvsPoplicola/elasticsearch,nomoa/elasticsearch,cwurm/elasticsearch,nilabhsagar/elasticsearch,strapdata/elassandra,winstonewert/elasticsearch,a2lin/elasticsearch,qwerty4030/elasticsearch,C-Bish/elasticsearch,gmarz/elasticsearch,scorpionvicky/elasticsearch,nezirus/elasticsearch,fred84/elasticsearch,henakamaMSFT/elasticsearch,nazarewk/elasticsearch,sreeramjayan/elasticsearch,scorpionvicky/elasticsearch,Helen-Zhao/elasticsearch,Shepard1212/elasticsearch,robin13/elasticsearch,henakamaMSFT/elasticsearch,kalimatas/elasticsearch,mmaracic/elasticsearch,awislowski/elasticsearch,elasticdog/elasticsearch,Helen-Zhao/elasticsearch,mjason3/elasticsearch,markwalkom/elasticsearch,JackyMai/elasticsearch,obourgain/elasticsearch,sneivandt/elasticsearch,lks21c/elasticsearch,nknize/elasticsearch,artnowo/elasticsearch,umeshdangat/elasticsearch,jimczi/elasticsearch,i-am-Nathan/elasticsearch,wenpos/elasticsearch,umeshdangat/elasticsearch,artnowo/elasticsearch,kalimatas/elasticsearch,shreejay/elasticsearch,naveenhooda2000/elasticsearch,mohit/elasticsearch,spiegela/elasticsearch,LeoYao/elasticsearch,awislowski/elasticsearch,strapdata/elassandra,jprante/elasticsearch,gingerwizard/elasticsearch,naveenhooda2000/elasticsearch,gfyoung/elasticsearch,girirajsharma/elasticsearch,zkidkid/elasticsearch,alexshadow007/elasticsearch,myelin/elasticsearch,Stacey-Gammon/elasticsearch,ricardocerq/elasticsearch,elasticdog/elasticsearch,njlawton/elasticsearch,trangvh/elasticsearch,robin13/elasticsearch,lks21c/elasticsearch,ThiagoGarciaAlves/elasticsearch,fred84/elasticsearch,mohit/elasticsearch,strapdata/elassandra5-rc,elasticdog/elasticsearch,winstonewert/elasticsearch,Shepard1212/elasticsearch,i-am-Nathan/elasticsearch,Shepard1212/elasticsearch,uschindler/elasticsearch,mmaracic/elasticsearch,camilojd/elasticsearch,ZTE-PaaS/elasticsearch,dpursehouse/elasticsearch,Shepard1212/elasticsearch,ZTE-PaaS/elasticsearch,mmaracic/elasticsearch,mjason3/elasticsearch,IanvsPoplicola/elasticsearch,brandonkearby/elasticsearch,avikurapati/elasticsearch,cwurm/elasticsearch,sneivandt/elasticsearch,GlenRSmith/elasticsearch,rlugojr/elasticsearch,scottsom/elasticsearch,yanjunh/elasticsearch,fred84/elasticsearch,alexshadow007/elasticsearch,JervyShi/elasticsearch,fred84/elasticsearch,njlawton/elasticsearch,s1monw/elasticsearch,nilabhsagar/elasticsearch,rajanm/elasticsearch,qwerty4030/elasticsearch,artnowo/elasticsearch,camilojd/elasticsearch,yanjunh/elasticsearch,JervyShi/elasticsearch,wuranbo/elasticsearch,wenpos/elasticsearch,LeoYao/elasticsearch,MaineC/elasticsearch,pozhidaevak/elasticsearch,kalimatas/elasticsearch,GlenRSmith/elasticsearch,ricardocerq/elasticsearch,rajanm/elasticsearch,mmaracic/elasticsearch,myelin/elasticsearch,nezirus/elasticsearch,henakamaMSFT/elasticsearch,glefloch/elasticsearch,henakamaMSFT/elasticsearch,liweinan0423/elasticsearch,brandonkearby/elasticsearch,yanjunh/elasticsearch,elasticdog/elasticsearch,fforbeck/elasticsearch,nknize/elasticsearch,umeshdangat/elasticsearch,rajanm/elasticsearch,qwerty4030/elasticsearch,MaineC/elasticsearch,wuranbo/elasticsearch,scottsom/elasticsearch,scottsom/elasticsearch,gfyoung/elasticsearch,IanvsPoplicola/elasticsearch,maddin2016/elasticsearch,brandonkearby/elasticsearch,jimczi/elasticsearch,palecur/elasticsearch,masaruh/elasticsearch,MaineC/elasticsearch,jimczi/elasticsearch,bawse/elasticsearch,MisterAndersen/elasticsearch,vroyer/elassandra,maddin2016/elasticsearch,LeoYao/elasticsearch,LewayneNaidoo/elasticsearch,Stacey-Gammon/elasticsearch,C-Bish/elasticsearch,spiegela/elasticsearch,LeoYao/elasticsearch,avikurapati/elasticsearch,obourgain/elasticsearch,avikurapati/elasticsearch,yanjunh/elasticsearch,nazarewk/elasticsearch,fernandozhu/elasticsearch,JSCooke/elasticsearch,fforbeck/elasticsearch,alexshadow007/elasticsearch,GlenRSmith/elasticsearch,shreejay/elasticsearch,maddin2016/elasticsearch,geidies/elasticsearch,geidies/elasticsearch,pozhidaevak/elasticsearch,shreejay/elasticsearch,HonzaKral/elasticsearch,winstonewert/elasticsearch,sreeramjayan/elasticsearch,alexshadow007/elasticsearch,nazarewk/elasticsearch,LewayneNaidoo/elasticsearch,kalimatas/elasticsearch,rlugojr/elasticsearch,markwalkom/elasticsearch,gingerwizard/elasticsearch,ThiagoGarciaAlves/elasticsearch,markwalkom/elasticsearch,StefanGor/elasticsearch,palecur/elasticsearch,scorpionvicky/elasticsearch,liweinan0423/elasticsearch,obourgain/elasticsearch,naveenhooda2000/elasticsearch,palecur/elasticsearch,njlawton/elasticsearch,zkidkid/elasticsearch,JSCooke/elasticsearch,wangtuo/elasticsearch,gfyoung/elasticsearch,zkidkid/elasticsearch,strapdata/elassandra5-rc,ZTE-PaaS/elasticsearch,gingerwizard/elasticsearch,nezirus/elasticsearch,wuranbo/elasticsearch,kalimatas/elasticsearch,vroyer/elasticassandra,robin13/elasticsearch,mmaracic/elasticsearch,wenpos/elasticsearch,zkidkid/elasticsearch,jprante/elasticsearch,JackyMai/elasticsearch,sreeramjayan/elasticsearch,dongjoon-hyun/elasticsearch,mortonsykes/elasticsearch,vroyer/elasticassandra,xuzha/elasticsearch,Helen-Zhao/elasticsearch,ZTE-PaaS/elasticsearch,mjason3/elasticsearch,nomoa/elasticsearch,JSCooke/elasticsearch,gmarz/elasticsearch,naveenhooda2000/elasticsearch,a2lin/elasticsearch,winstonewert/elasticsearch,wenpos/elasticsearch,trangvh/elasticsearch,sneivandt/elasticsearch,ricardocerq/elasticsearch,a2lin/elasticsearch,brandonkearby/elasticsearch,jimczi/elasticsearch,strapdata/elassandra,coding0011/elasticsearch,s1monw/elasticsearch,avikurapati/elasticsearch,JervyShi/elasticsearch,alexshadow007/elasticsearch,camilojd/elasticsearch,gmarz/elasticsearch,i-am-Nathan/elasticsearch,jprante/elasticsearch,rlugojr/elasticsearch,nomoa/elasticsearch,coding0011/elasticsearch,fernandozhu/elasticsearch,ThiagoGarciaAlves/elasticsearch,wenpos/elasticsearch,strapdata/elassandra5-rc,LeoYao/elasticsearch,mjason3/elasticsearch,xuzha/elasticsearch,shreejay/elasticsearch,coding0011/elasticsearch,gingerwizard/elasticsearch,ThiagoGarciaAlves/elasticsearch,geidies/elasticsearch,nknize/elasticsearch,pozhidaevak/elasticsearch,dongjoon-hyun/elasticsearch,C-Bish/elasticsearch,nilabhsagar/elasticsearch,sneivandt/elasticsearch,C-Bish/elasticsearch,myelin/elasticsearch,strapdata/elassandra,nezirus/elasticsearch,nazarewk/elasticsearch,fforbeck/elasticsearch,mortonsykes/elasticsearch,scottsom/elasticsearch,masaruh/elasticsearch,nomoa/elasticsearch,fforbeck/elasticsearch,StefanGor/elasticsearch,sneivandt/elasticsearch,mortonsykes/elasticsearch,yynil/elasticsearch,StefanGor/elasticsearch,awislowski/elasticsearch,xuzha/elasticsearch,ricardocerq/elasticsearch,strapdata/elassandra5-rc,dpursehouse/elasticsearch,girirajsharma/elasticsearch,cwurm/elasticsearch,xuzha/elasticsearch,JervyShi/elasticsearch,markwalkom/elasticsearch,MisterAndersen/elasticsearch,HonzaKral/elasticsearch,girirajsharma/elasticsearch,HonzaKral/elasticsearch,bawse/elasticsearch,uschindler/elasticsearch,dongjoon-hyun/elasticsearch,mortonsykes/elasticsearch,camilojd/elasticsearch,palecur/elasticsearch,henakamaMSFT/elasticsearch,JSCooke/elasticsearch,Stacey-Gammon/elasticsearch,glefloch/elasticsearch,s1monw/elasticsearch,coding0011/elasticsearch,elasticdog/elasticsearch,wangtuo/elasticsearch,fernandozhu/elasticsearch,liweinan0423/elasticsearch,masaruh/elasticsearch,sreeramjayan/elasticsearch,glefloch/elasticsearch,artnowo/elasticsearch,LewayneNaidoo/elasticsearch,markwalkom/elasticsearch,shreejay/elasticsearch,LeoYao/elasticsearch,yynil/elasticsearch,nilabhsagar/elasticsearch,camilojd/elasticsearch,MisterAndersen/elasticsearch,uschindler/elasticsearch,rajanm/elasticsearch,maddin2016/elasticsearch,dongjoon-hyun/elasticsearch,MisterAndersen/elasticsearch,wuranbo/elasticsearch,nomoa/elasticsearch,njlawton/elasticsearch,umeshdangat/elasticsearch,fernandozhu/elasticsearch,MisterAndersen/elasticsearch,JervyShi/elasticsearch,wangtuo/elasticsearch,rlugojr/elasticsearch,umeshdangat/elasticsearch,zkidkid/elasticsearch,GlenRSmith/elasticsearch,StefanGor/elasticsearch,gingerwizard/elasticsearch,vroyer/elasticassandra,a2lin/elasticsearch,pozhidaevak/elasticsearch,jprante/elasticsearch,masaruh/elasticsearch,maddin2016/elasticsearch,s1monw/elasticsearch,gmarz/elasticsearch,mikemccand/elasticsearch,IanvsPoplicola/elasticsearch,dpursehouse/elasticsearch,JackyMai/elasticsearch,awislowski/elasticsearch,obourgain/elasticsearch,Helen-Zhao/elasticsearch,Stacey-Gammon/elasticsearch,avikurapati/elasticsearch,scorpionvicky/elasticsearch,spiegela/elasticsearch,ZTE-PaaS/elasticsearch,awislowski/elasticsearch,cwurm/elasticsearch,coding0011/elasticsearch,scottsom/elasticsearch,Shepard1212/elasticsearch,nknize/elasticsearch,gfyoung/elasticsearch,mortonsykes/elasticsearch,bawse/elasticsearch,Helen-Zhao/elasticsearch,qwerty4030/elasticsearch,xuzha/elasticsearch,cwurm/elasticsearch,i-am-Nathan/elasticsearch,yynil/elasticsearch,fernandozhu/elasticsearch,ricardocerq/elasticsearch,trangvh/elasticsearch,geidies/elasticsearch,bawse/elasticsearch,rajanm/elasticsearch,nezirus/elasticsearch