Fix missing submodules in publish action checkout (#1)

.github/workflows/publish.yaml

@@ -10,6 +10,8 @@ jobs:
     environment: pypi
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true
 
       - name: "Install uv"
         uses: astral-sh/setup-uv@v6