docs(release_checklist): Adds information about new release meetings
docs(release_checklist): Adds information about new release meetings

We have decided to start having release meetings to define clear objectives
for a release. This documents the process.

fibonacci1729/helm,appscode/helm,jascott1/helm,fibonacci1729/helm,jascott1/helm,technosophos/deployment-manager,appscode/helm,technosophos/deployment-manager,technosophos/deployment-manager,technosophos/deployment-manager,technosophos/k8s-helm,technosophos/k8s-helm,technosophos/deployment-manager,SlickNik/helm,SlickNik/helm