chore: specify python version for venv

.github/workflows/docs.yml

@@ -9,7 +9,7 @@ jobs:
       - name: Set up Python
         run: uv python install 3.11
       - name: Set up virtual environment
-        run: uv venv
+        run: uv venv --python 3.11
       - name: Activate virtual environment
         run: source .venv/bin/activate
       - name: Load development dependencies