Add pull request trigger to release drafter workflow

Author: xterao

.github/workflows/release-drafter.yml

@@ -4,11 +4,11 @@ on:
   push:
     branches:
       - main
+  pull_request:
   workflow_dispatch:
 
 jobs:
   update_release_draft:
-    if: ${{ !contains(github.head_ref, 'doc/changelog-update-') && startsWith(github.event.head_commit.message, 'Merge pull request') }}
     permissions:
       contents: write
       pull-requests: write
@@ -20,14 +20,19 @@ jobs:
     steps:
       - name: Check Commit Message
         id: check
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
         run: |
           # Define a regex pattern to match commit messages for changelog updates
           CHANGELOG_UPDATE_PATTERN="^Merge pull request #[0-9]+ from ${{ github.repository_owner }}/doc/changelog-update-.*$"
+          MESSAGE=$(git log --format=%B -n 1 ${{ github.event.pull_request.head.sha }})
           
-          if [[ "${{ github.event.head_commit.message }}" =~ $CHANGELOG_UPDATE_PATTERN ]]; then
+          if [[ "MESSAGE" =~ $CHANGELOG_UPDATE_PATTERN ]]; then
             echo "This commit is not target. Skip the workflow."
             echo "SKIP_JOB=true" >> $GITHUB_OUTPUT
           else
+            echo "This commit is target."
+            echo "$MESSAGE"
             echo "SKIP_JOB=false" >> $GITHUB_OUTPUT
           fi
       - uses: release-drafter/release-drafter@v6
@@ -104,5 +109,6 @@ jobs:
             exit 0
           fi
           git commit -am "Update Version With Release Draft - $REPLACE_VERSION"
-          git push origin main
+          BRANCH_NAME=$(git rev-parse --abbrev-ref HEAD)
+          git push origin $BRANCH_NAME