Create sync-fork.yml

Author: vvscode

.github/workflows/sync-fork.yml

@@ -0,0 +1,17 @@
+name: Sync Fork
+
+on:
+  schedule:
+    - cron: '* */12 * * *' # https://crontab.guru/#*_*/12_*_*_*
+  workflow_dispatch: # on button click
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: tgymnich/[email protected]
+        with:
+          owner: llvm
+          base: master
+          head: master