Updated playbook (#1417)
Updated playbook (#1417)

In Preparing New Release :step 5, For Patch Release we don't need to send an email announcement.
In Push Release:step 2, Instead of Unblock the steps added in detail with "Deploy release artifacts" .
bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration