Revert "Use test version of release-notes-bot-action"

This reverts commit 3d3d3d8.

Author: SeanTAllen

.github/workflows/release-notes.yml

@@ -16,7 +16,7 @@ jobs:
     name: Update release notes
     steps:
       - name: Update
-        uses: ghcr.io/ponylang/release-notes-bot-action:march8weird
+        uses: docker://ghcr.io/ponylang/release-notes-bot-action:0.3.9
         with:
           GIT_USER_NAME: "Ponylang Main Bot"
           GIT_USER_EMAIL: "[email protected]"