docs(release): v1.30.0 and v1.31.0 release template improvements

[rjan90]

Related Issues

#12480 and #12344

Proposed Changes

Accumulating release template improvements from shipping the v1.30.0 and v1.31.0 release.

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title conforms with contribution conventions
• Update CHANGELOG.md or signal that this change does not need it per contribution conventions
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green

[rjan90]

Just adding as a note to myself. We should add a step in here to remove the content:

[rjan90]

For later, wondering if we should move the "Remove the "backport" label from all backported PRs" to after merging the PR. That will make it easier for others reviewing if something has been missed out:

[BigLep]

2024-11-12 discussion idea: to avoid text duplication between the changelog and the release page, just have the release page point to the changelog.md file rather than copy/paste. One minor benefit beyond avoiding copy/paste is that then don't have to worry about when changelog.md links to other markdown files.