Update auto-update.yml

.github/workflows/auto-update.yml

@@ -69,3 +69,20 @@ jobs:
         with:
           name: README.md
           path: README.md
+  pull-request:
+    needs: update-readme
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Download Artifacts
+        uses: actions/download-artifact@v2
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v3
+        with:
+          title: '[Bot] Update playlists'
+          body: |
+            This pull request is created automatically by `auto-update` action.
+          commit-message: '[Bot] Update playlists'
+          branch: bot/auto-update
+          delete-branch: true