test: checkout submodules

Author: andhreljaKern

.github/workflows/pi_build.yml

@@ -103,7 +103,8 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: '${{ github.repository_owner }}/refinery-${{ matrix.parent_image_type }}-parent-image'
-          submodules: 'recursive'
+          submodules: 'true'
+          fetch-depth: 0
 
       - name: Set up Python
         uses: actions/setup-python@v5