fix: checkout submodule on repo checkout

Signed-off-by: Magyari Sandor Szilard <[email protected]>

Author: sancyx

.github/workflows/reusable-docker-build-push.yaml

@@ -38,6 +38,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
         with:
+          submodules: 'true'
           fetch-depth: 0
 
       - name: Login to GitHub Container Registry