user docs: Add *Subscriptions* macro to *Rename a stream* doc.
user docs: Add *Subscriptions* macro to *Rename a stream* doc.

vabs22/zulip,j831/zulip,jphilipsen05/zulip,showell/zulip,rht/zulip,samatdav/zulip,jrowan/zulip,zulip/zulip,niftynei/zulip,cosmicAsymmetry/zulip,punchagan/zulip,vabs22/zulip,blaze225/zulip,JPJPJPOPOP/zulip,souravbadami/zulip,JPJPJPOPOP/zulip,jackrzhang/zulip,amanharitsh123/zulip,hackerkid/zulip,dattatreya303/zulip,Galexrt/zulip,samatdav/zulip,Diptanshu8/zulip,amyliu345/zulip,Diptanshu8/zulip,cosmicAsymmetry/zulip,cosmicAsymmetry/zulip,andersk/zulip,mahim97/zulip,vabs22/zulip,brainwane/zulip,synicalsyntax/zulip,timabbott/zulip,vabs22/zulip,brockwhittaker/zulip,tommyip/zulip,blaze225/zulip,blaze225/zulip,zulip/zulip,shubhamdhama/zulip,eeshangarg/zulip,ryanbackman/zulip,dawran6/zulip,jackrzhang/zulip,sharmaeklavya2/zulip,rishig/zulip,PhilSk/zulip,kou/zulip,verma-varsha/zulip,AZtheAsian/zulip,Diptanshu8/zulip,synicalsyntax/zulip,showell/zulip,dhcrzf/zulip,timabbott/zulip,synicalsyntax/zulip,punchagan/zulip,souravbadami/zulip,jackrzhang/zulip,dattatreya303/zulip,cosmicAsymmetry/zulip,andersk/zulip,PhilSk/zulip,JPJPJPOPOP/zulip,mahim97/zulip,souravbadami/zulip,jainayush975/zulip,verma-varsha/zulip,synicalsyntax/zulip,SmartPeople/zulip,jackrzhang/zulip,SmartPeople/zulip,brockwhittaker/zulip,susansls/zulip,rht/zulip,rht/zulip,Galexrt/zulip,amyliu345/zulip,jrowan/zulip,dhcrzf/zulip,tommyip/zulip,JPJPJPOPOP/zulip,brainwane/zulip,AZtheAsian/zulip,j831/zulip,showell/zulip,jrowan/zulip,dhcrzf/zulip,christi3k/zulip,Diptanshu8/zulip,brainwane/zulip,dhcrzf/zulip,tommyip/zulip,PhilSk/zulip,samatdav/zulip,zulip/zulip,JPJPJPOPOP/zulip,susansls/zulip,ryanbackman/zulip,timabbott/zulip,verma-varsha/zulip,niftynei/zulip,rishig/zulip,zulip/zulip,samatdav/zulip,kou/zulip,shubhamdhama/zulip,andersk/zulip,Diptanshu8/zulip,synicalsyntax/zulip,niftynei/zulip,amyliu345/zulip,eeshangarg/zulip,jackrzhang/zulip,jainayush975/zulip,tommyip/zulip,kou/zulip,SmartPeople/zulip,sonali0901/zulip,samatdav/zulip,Galexrt/zulip,ryanbackman/zulip,verma-varsha/zulip,rht/zulip,jainayush975/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,j831/zulip,souravbadami/zulip,amanharitsh123/zulip,dawran6/zulip,j831/zulip,punchagan/zulip,susansls/zulip,vabs22/zulip,timabbott/zulip,mahim97/zulip,christi3k/zulip,andersk/zulip,dattatreya303/zulip,showell/zulip,susansls/zulip,rishig/zulip,j831/zulip,SmartPeople/zulip,vaidap/zulip,brockwhittaker/zulip,amanharitsh123/zulip,isht3/zulip,sharmaeklavya2/zulip,amanharitsh123/zulip,sharmaeklavya2/zulip,synicalsyntax/zulip,hackerkid/zulip,niftynei/zulip,rht/zulip,brainwane/zulip,kou/zulip,SmartPeople/zulip,niftynei/zulip,jphilipsen05/zulip,vaidap/zulip,amyliu345/zulip,susansls/zulip,dawran6/zulip,aakash-cr7/zulip,mahim97/zulip,Diptanshu8/zulip,sharmaeklavya2/zulip,christi3k/zulip,synicalsyntax/zulip,jackrzhang/zulip,hackerkid/zulip,showell/zulip,zulip/zulip,eeshangarg/zulip,jrowan/zulip,andersk/zulip,rht/zulip,dawran6/zulip,ryanbackman/zulip,samatdav/zulip,eeshangarg/zulip,dhcrzf/zulip,punchagan/zulip,mahim97/zulip,vaidap/zulip,timabbott/zulip,aakash-cr7/zulip,kou/zulip,shubhamdhama/zulip,brainwane/zulip,Galexrt/zulip,kou/zulip,rishig/zulip,dawran6/zulip,aakash-cr7/zulip,AZtheAsian/zulip,rishig/zulip,jainayush975/zulip,zulip/zulip,eeshangarg/zulip,sonali0901/zulip,isht3/zulip,brockwhittaker/zulip,PhilSk/zulip,sharmaeklavya2/zulip,rishig/zulip,jphilipsen05/zulip,Galexrt/zulip,isht3/zulip,hackerkid/zulip,brainwane/zulip,niftynei/zulip,tommyip/zulip,rht/zulip,vaidap/zulip,vaidap/zulip,cosmicAsymmetry/zulip,aakash-cr7/zulip,susansls/zulip,isht3/zulip,brainwane/zulip,sonali0901/zulip,jrowan/zulip,dattatreya303/zulip,showell/zulip,timabbott/zulip,sonali0901/zulip,Galexrt/zulip,PhilSk/zulip,verma-varsha/zulip,christi3k/zulip,amyliu345/zulip,sonali0901/zulip,AZtheAsian/zulip,aakash-cr7/zulip,christi3k/zulip,jphilipsen05/zulip,jphilipsen05/zulip,amanharitsh123/zulip,ryanbackman/zulip,isht3/zulip,eeshangarg/zulip,vabs22/zulip,dattatreya303/zulip,Galexrt/zulip,jphilipsen05/zulip,hackerkid/zulip,andersk/zulip,tommyip/zulip,ryanbackman/zulip,mahim97/zulip,hackerkid/zulip,blaze225/zulip,showell/zulip,jainayush975/zulip,brockwhittaker/zulip,eeshangarg/zulip,j831/zulip,brockwhittaker/zulip,shubhamdhama/zulip,JPJPJPOPOP/zulip,PhilSk/zulip,christi3k/zulip,vaidap/zulip,jainayush975/zulip,blaze225/zulip,blaze225/zulip,SmartPeople/zulip,amyliu345/zulip,shubhamdhama/zulip,kou/zulip,dhcrzf/zulip,aakash-cr7/zulip,tommyip/zulip,shubhamdhama/zulip,souravbadami/zulip,verma-varsha/zulip,cosmicAsymmetry/zulip,isht3/zulip,jackrzhang/zulip,rishig/zulip,sonali0901/zulip,dhcrzf/zulip,dawran6/zulip,punchagan/zulip,punchagan/zulip,AZtheAsian/zulip,sharmaeklavya2/zulip,AZtheAsian/zulip,punchagan/zulip,timabbott/zulip,shubhamdhama/zulip,amanharitsh123/zulip,jrowan/zulip,souravbadami/zulip,dattatreya303/zulip