[DOCS] Added note to high level client docs on version
[DOCS] Added note to high level client docs on version

The alpha2 docs is built out of master which may make users think that the high level client was already released as part of alpha2 which it was not. This note should clarify that the client will be released with 6.0.0-beta1

wenpos/elasticsearch,s1monw/elasticsearch,robin13/elasticsearch,uschindler/elasticsearch,wenpos/elasticsearch,umeshdangat/elasticsearch,markwalkom/elasticsearch,ThiagoGarciaAlves/elasticsearch,HonzaKral/elasticsearch,sneivandt/elasticsearch,Stacey-Gammon/elasticsearch,gingerwizard/elasticsearch,gingerwizard/elasticsearch,sneivandt/elasticsearch,vroyer/elasticassandra,mohit/elasticsearch,rajanm/elasticsearch,wenpos/elasticsearch,vroyer/elasticassandra,pozhidaevak/elasticsearch,scorpionvicky/elasticsearch,maddin2016/elasticsearch,gfyoung/elasticsearch,mjason3/elasticsearch,coding0011/elasticsearch,gfyoung/elasticsearch,kalimatas/elasticsearch,markwalkom/elasticsearch,HonzaKral/elasticsearch,fred84/elasticsearch,uschindler/elasticsearch,vroyer/elassandra,maddin2016/elasticsearch,mohit/elasticsearch,maddin2016/elasticsearch,gingerwizard/elasticsearch,nknize/elasticsearch,qwerty4030/elasticsearch,vroyer/elassandra,coding0011/elasticsearch,s1monw/elasticsearch,fred84/elasticsearch,maddin2016/elasticsearch,rajanm/elasticsearch,pozhidaevak/elasticsearch,umeshdangat/elasticsearch,nknize/elasticsearch,shreejay/elasticsearch,maddin2016/elasticsearch,scottsom/elasticsearch,wenpos/elasticsearch,rajanm/elasticsearch,wangtuo/elasticsearch,GlenRSmith/elasticsearch,mjason3/elasticsearch,brandonkearby/elasticsearch,scorpionvicky/elasticsearch,robin13/elasticsearch,kalimatas/elasticsearch,umeshdangat/elasticsearch,nknize/elasticsearch,wangtuo/elasticsearch,ThiagoGarciaAlves/elasticsearch,GlenRSmith/elasticsearch,fred84/elasticsearch,wangtuo/elasticsearch,fred84/elasticsearch,kalimatas/elasticsearch,gfyoung/elasticsearch,kalimatas/elasticsearch,ThiagoGarciaAlves/elasticsearch,masaruh/elasticsearch,masaruh/elasticsearch,scottsom/elasticsearch,strapdata/elassandra,GlenRSmith/elasticsearch,robin13/elasticsearch,rajanm/elasticsearch,pozhidaevak/elasticsearch,vroyer/elasticassandra,ThiagoGarciaAlves/elasticsearch,masaruh/elasticsearch,qwerty4030/elasticsearch,brandonkearby/elasticsearch,lks21c/elasticsearch,gingerwizard/elasticsearch,scottsom/elasticsearch,GlenRSmith/elasticsearch,masaruh/elasticsearch,strapdata/elassandra,gingerwizard/elasticsearch,wangtuo/elasticsearch,robin13/elasticsearch,pozhidaevak/elasticsearch,sneivandt/elasticsearch,GlenRSmith/elasticsearch,mohit/elasticsearch,strapdata/elassandra,shreejay/elasticsearch,jimczi/elasticsearch,gfyoung/elasticsearch,jimczi/elasticsearch,vroyer/elassandra,pozhidaevak/elasticsearch,Stacey-Gammon/elasticsearch,markwalkom/elasticsearch,ThiagoGarciaAlves/elasticsearch,lks21c/elasticsearch,brandonkearby/elasticsearch,robin13/elasticsearch,coding0011/elasticsearch,brandonkearby/elasticsearch,rajanm/elasticsearch,coding0011/elasticsearch,jimczi/elasticsearch,lks21c/elasticsearch,lks21c/elasticsearch,uschindler/elasticsearch,sneivandt/elasticsearch,s1monw/elasticsearch,s1monw/elasticsearch,rajanm/elasticsearch,mjason3/elasticsearch,HonzaKral/elasticsearch,sneivandt/elasticsearch,coding0011/elasticsearch,wangtuo/elasticsearch,umeshdangat/elasticsearch,HonzaKral/elasticsearch,mohit/elasticsearch,uschindler/elasticsearch,lks21c/elasticsearch,kalimatas/elasticsearch,shreejay/elasticsearch,umeshdangat/elasticsearch,markwalkom/elasticsearch,mjason3/elasticsearch,nknize/elasticsearch,shreejay/elasticsearch,s1monw/elasticsearch,ThiagoGarciaAlves/elasticsearch,Stacey-Gammon/elasticsearch,shreejay/elasticsearch,Stacey-Gammon/elasticsearch,wenpos/elasticsearch,nknize/elasticsearch,strapdata/elassandra,gfyoung/elasticsearch,jimczi/elasticsearch,strapdata/elassandra,masaruh/elasticsearch,scottsom/elasticsearch,scottsom/elasticsearch,jimczi/elasticsearch,markwalkom/elasticsearch,brandonkearby/elasticsearch,qwerty4030/elasticsearch,mohit/elasticsearch,uschindler/elasticsearch,fred84/elasticsearch,mjason3/elasticsearch,qwerty4030/elasticsearch,scorpionvicky/elasticsearch,markwalkom/elasticsearch,gingerwizard/elasticsearch,gingerwizard/elasticsearch,scorpionvicky/elasticsearch,scorpionvicky/elasticsearch,qwerty4030/elasticsearch,Stacey-Gammon/elasticsearch