Switched to git commands.

Author: manastalukdar

.github/workflows/main.yml

@@ -11,9 +11,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Checkout submodules
-        uses: srt32/[email protected]
-        with:
-          args: git submodule update --init --recursive
+        run: git submodule update --init --recursive
       - uses: actions/setup-java@v1
         with:
           java-version: '15.0.0'