Merge pull request #14 from git-for-windows/arm64-runners-sync

sync (CI): run on arm64 runners

Author: dscho

.github/workflows/sync.yml

@@ -17,7 +17,7 @@ env:
 jobs:
   sync:
     if: github.repository_owner == 'git-for-windows' || github.event.inputs.debug_with_ssh_key != ''
-    runs-on: windows-latest
+    runs-on: [Windows, ARM64]
     environment: sync
     steps:
       - name: clone git-sdk-arm64