Fixes #33434 - API docs to specify using base64url
Fixes #33434 - API docs to specify using base64url

Specify base64url rather than base64. Also correct other links to the base64url section of RFC4648

Signed-off-by: Mike Bush <4abd088a9818820b756044ae73aecf706467a475@gmail.com>

estesp/docker,konstruktoid/docker-upstream,yosifkit/docker,yosifkit/docker,konstruktoid/docker-1,paralin/docker,gnailuy/docker,nalind/docker,justincormack/docker,trebonian/docker,djs55/docker,flavio/docker,Mokolea/docker,estesp/docker,moul/docker,thaJeztah/docker,nalind/docker,Mokolea/docker,cpuguy83/docker,nalind/docker,docker/docker,thaJeztah/docker,mahak/docker,bearstech/moby,jthelin/docker,jameszhan/docker,djs55/docker,jameszhan/docker,cpuguy83/docker,ibuildthecloud/docker,vdemeester/docker,trebonian/docker,thaJeztah/docker,mahak/docker,jimjag/docker,nalind/docker,konstruktoid/docker-upstream,Mokolea/docker,moul/docker,konstruktoid/docker-1,ibuildthecloud/docker,SvenDowideit/docker,trebonian/docker,bearstech/moby,paralin/docker,gnailuy/docker,flavio/docker,AkihiroSuda/docker,docker/docker,jimjag/docker,djs55/docker,flavio/docker,justincormack/docker,justincormack/docker,jimjag/docker,SvenDowideit/docker,dims/docker,estesp/docker,mahak/docker,moby/moby,cpuguy83/docker,Ramzec/docker,trebonian/docker,dims/docker,cpuguy83/docker,paralin/docker,konstruktoid/docker-upstream,Mokolea/docker,ibuildthecloud/docker,konstruktoid/docker-upstream,kojiromike/docker,thaJeztah/docker,kojiromike/docker,AkihiroSuda/docker,gnailuy/docker,paralin/docker,kojiromike/docker,bearstech/moby,yosifkit/docker,jameszhan/docker,nawawi/docker,bearstech/moby,nawawi/docker,dims/docker,konstruktoid/docker-1,moul/docker,flavio/docker,jthelin/docker,nawawi/docker,Ramzec/docker,moby/moby,Ramzec/docker,Ramzec/docker,gnailuy/docker,mahak/docker,moby/moby,jimjag/docker,vdemeester/docker,moul/docker,jvanz/docker,jvanz/docker,vdemeester/docker,ibuildthecloud/docker,AkihiroSuda/docker,ibuildthecloud/docker,yosifkit/docker,jvanz/docker,nawawi/docker,SvenDowideit/docker,docker/docker,AkihiroSuda/docker,moby/moby