Create sync.yml

.github/workflows/sync.yml

@@ -0,0 +1,31 @@
+name: Sync upstream branch
+
+on:
+  schedule:
+    - cron: '14 6 * * *'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+concurrency:
+  group: "sync"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          ref: upstream
+
+      - name: Git
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git remote add up https://github.com/scratchfoundation/scratch-gui.git
+          git pull up develop
+          git push -u origin upstream
+          git push