fix submodule

Author: olly-writes-code

.github/workflows/publish.yml

@@ -16,6 +16,8 @@ jobs:
         python-version: [3.13]
     steps:
         - uses: actions/checkout@v5
+          with:
+            submodules: true
 
         - name: Install uv
           uses: astral-sh/setup-uv@v6