This Github action automatically comments on PRs and Issues when a fix is released for them.

Use this action in a workflow triggered by a release. It will scan commits between that and the prior release, find associated Issues and PRs, and comment on them to let people know a release has been made. Associated Issues and PRs can be directly linked to the commit or manually linked from a PR associated with the commit.

on:
  release:
    types: [published]

jobs:
  release:
    steps:
      - uses: apexskier/github-release-commenter@latest
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}