Update pull_request.yml

.github/workflows/pull_request.yml

@@ -20,14 +20,16 @@ jobs:
         npm run coverage
       env:
         CI: true
-    - name: automerge
-      if: success()
+    - name: Merge PR
+      if: success() && ${{ github.actor == 'dependabot[bot]' }}
       uses: "pascalgn/automerge-action@v0.14.2"
       env:
         GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
         MERGE_LABELS: "dependencies"
     - name: Reject PR
-      if: failure()
-      uses: superbrothers/close-pull-request@v3
+      if: failure() && ${{ github.actor == 'dependabot[bot]' }}
+      uses: peter-evans/close-pull@v1
       with:
-        comment: "PR closed due to failing tests."
+        pull-request-number: ${{github.event.number}}
+        comment: PR closed due to failing tests
+        delete-branch: true