Create sync-fork.yml (#3)

Author: heath-freenome

.github/workflows/sync-fork.yml

@@ -0,0 +1,27 @@
+name: Sync Fork
+on:
+  schedule:
+    - cron: '0 0 * * 0'
+  workflow_dispatch:
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/create-github-app-token@v1
+        id: app-token
+        with:
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
+      
+      - uses: actions/checkout@v3
+        with:
+          token: ${{ steps.app-token.outputs.token }}
+          fetch-depth: 0
+      
+      - name: Sync with upstream
+        run: |
+          git remote add upstream https://github.com/rjsf-team/react-jsonschema-form.git
+          git fetch upstream
+          git merge upstream/main --ff-only
+          git push origin main