Update auto-update.yml

.github/workflows/auto-update.yml

@@ -85,6 +85,7 @@ jobs:
         with:
           name: README.md
       - name: Create Pull Request
+        id: pr
         uses: peter-evans/create-pull-request@v3
         with:
           title: '[Bot] Update playlists'
@@ -93,3 +94,16 @@ jobs:
           commit-message: '[Bot] Update playlists'
           branch: bot/auto-update
           delete-branch: true
+      - name: Approve Pull Request
+        if: steps.pr.outputs.pull-request-operation == 'created'
+        uses: juliangruber/approve-pull-request-action@v1
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          number: ${{ steps.pr.outputs.pull-request-number }}
+      - name: Merge Pull Request
+        if: steps.pr.outputs.pull-request-operation == 'created'
+        uses: peter-evans/enable-pull-request-automerge@v1
+        with:
+          token: ${{ secrets.PAT }}
+          pull-request-number: ${{ steps.pr.outputs.pull-request-number }}
+          merge-method: squash