Only update git-review docs on release
Only update git-review docs on release

Most consumers of git-review only use released versions, so make
sure we update the published documentation for it at release but no
more often than that. Publishing on new commits to the master branch
potentially confuses users since it makes not-yet-released features
look supported.

Change-Id: I20b25d8f0d717c5939538a4c67f86fa9078500bd

coolsvap/project-config,anbangr/osci-project-config,coolsvap/project-config,noorul/os-project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config,dongwenjuan/project-config,openstack-infra/project-config,anbangr/osci-project-config,dongwenjuan/project-config,noorul/os-project-config