Rework minor_version_release.yml to create PR that bumps version

.github/workflows/minor_version_release.yml

@@ -53,17 +53,35 @@ jobs:
       - name: Bump version on ${{ steps.branch.outputs.name }}
         shell: bash
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # We use the HAYSTACK_BOT_TOKEN here so the PR created by the step will
+          # trigger required workflows and can be merged by anyone
+          GITHUB_TOKEN: ${{ secrets.HAYSTACK_BOT_TOKEN }}
         run: |
           git checkout "${{ steps.branch.outputs.name }}"
+
+          # Tag the base with X.Y.Z-rc0.
+          # At this point VERSION.txt still contains the previous version and not
+          # the one specified by the tag.
+          # This is good though as we just need this to make reno work properly.
           NEW_VERSION=$(awk -F. '/[0-9]+\./{$2++;print}' OFS=. < VERSION.txt)
           echo "$NEW_VERSION" > VERSION.txt
+          VERSION_TAG="v$NEW_VERSION"
+          git tag "$VERSION_TAG" -m"$VERSION_TAG"
+          git push --tags
+
+          # Create the branch that bump version in dev branch
           cat VERSION.txt
+          git checkout -b bump-version
           git add .
           git commit -m "Update unstable version to $NEW_VERSION"
-          VERSION_TAG="v$NEW_VERSION"
-          git tag "$VERSION_TAG" -m"$VERSION_TAG"
-          git push --atomic origin "${{ steps.branch.outputs.name }}" "$VERSION_TAG"
+          g push -u origin bump-version
+
+          # Create the PR
+          gh pr create -B "${{ steps.branch.outputs.name }}" \
+            -H bump-version \
+            --title 'Bump unstable version' \
+            --body 'Part of the release process' \
+            --label 'ignore-for-release-notes'
 
       - uses: actions/setup-python@v5
         with: