Add changes from patch template to montly template
What
Adds canary deploy and detailed sync instructions to from patch.md template to montly.md
Why
Closes https://gitlab.com/gitlab-org/release-tools/issues/84
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Adds canary deploy and detailed sync instructions to from patch.md template to montly.md
Closes https://gitlab.com/gitlab-org/release-tools/issues/84