feat: add workflow to comment on PRs when released (#1750)

.github/workflows/release-comment.yml

@@ -0,0 +1,18 @@
+name: Comment on Released PRs
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: apexskier/github-release-commenter@v1
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          comment-template: |
+            This PR is included in version [{release_tag}]({release_link})