fix: add fetch-depth to checkout

.github/workflows/docs.yml

@@ -14,6 +14,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # to get gh-pages
       - uses: astral-sh/setup-uv@v3
       - name: Sync
         run: uv sync