add submodule clone

Author: LAhmos

.github/workflows/test-build.yml

@@ -21,7 +21,10 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v4
+      - name: Checkout repository with submodules
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive  # This clones submodules
 
       - name: Build Apps
         run: |