ci: fix docs build missing uv install

Author: Fizzadar

.github/workflows/docs.yml

@@ -29,7 +29,8 @@ jobs:
 
       - name: Set up Python
         uses: actions/setup-python@v5
-
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
       - name: Install
         run: |
           uv sync --group docs --no-default-groups