ci: used git commands to fetch submodule (#119)

Author: swiftylab-ci

.github/workflows/main.yml

@@ -44,9 +44,6 @@ jobs:
       if: contains(steps.metadata.outputs.dependency-names, 'swiftorg')
       uses: actions/checkout@v4
       with:
-        fetch-depth: 0
-        submodules: true
-        ref: ${{ github.event.pull_request.head.ref }}
         token: ${{ secrets.COMMIT_TOKEN }}
 
     - name: Import GPG