Fix CI: checkout submodules recursively

Author: cooper667

.github/workflows/build-deploy.yml

@@ -31,6 +31,8 @@ jobs:
       environment: ${{ steps.set-env.outputs.environment }}
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+        with:
+          submodules: recursive
 
       - name: Determine environment and image tag
         id: set-env