Added --remote --merge to submodule update.

Author: manastalukdar

.github/workflows/main.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Checkout submodules
-        run: git submodule update --init --recursive
+        run: git submodule update --init --recursive --remote --merge
       - uses: actions/setup-java@v1
         with:
           java-version: '15.0.0'
@@ -29,7 +29,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Checkout submodules
-        run: git submodule update --init --recursive
+        run: git submodule update --init --recursive --remote --merge
       - uses: actions/setup-python@v2
         with:
           python-version: '3.9'
@@ -48,7 +48,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Checkout submodules
-        run: git submodule update --init --recursive
+        run: git submodule update --init --recursive --remote --merge
       - uses: actions/setup-dotnet@v1
         with:
           dotnet-version: '5.0.100'