release: procedure change (cosmos#6148)

.github/workflows/release-sims.yml

@@ -1,8 +1,8 @@
 name: Release Sims
 on: 
-  push: 
+  pull_request: 
     branches: 
-      - /^v.*/
+      - 'rc**'
 
 jobs:
   cleanup-runs:

CONTRIBUTING.md

@@ -231,17 +231,17 @@ At the moment, only a single major release will be supported, so all point
 releases will be based off of that release.
 
 - start on `vX.XX.X`
-- checkout a new branch `pre-rc/vX.X.X`
+- checkout a new branch `rcN/vX.X.X`
 - cherry pick the desired changes from `master`
   - these changes should be small and NON-BREAKING (both API and state machine)
 - add entries to CHANGELOG.md and remove corresponding pending log entries
-- checkout a new branch `rc/vX.X.X` based off of `vX.XX.X`
-- create a PR merging `pre-rc/vX.X.X` into `rc/vX.X.X`
+- checkout a new branch `release/vX.X.X` based off of the previous release
+- create a PR merging `rcN/vX.X.X` into `release/vX.X.X`
 - run tests and simulations (noted in [Release Procedure](#release-procedure))
-- after tests and simulation have successfully completed, create the release branch `release/vX.XX.X` from the `RC` branch
-- delete the `pre-rc/vX.X.X` and `RC` branches
+- after tests and simulation have successfully completed, merge the `RC` branch into `release/vX.X.X`
+  - Make sure to delete the `RC` branch
 - create a PR into `master` containing ONLY the CHANGELOG.md updates
-- tag (use `git tag -a`) then push the `release/vX.XX.X` branch & tag (`git push --tags`)
+- tag (use `git tag -a`) then push the tags (`git push --tags`)
 
 ## Code Owner Membership