use official action

.github/workflows/main.yml

@@ -11,9 +11,11 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: "3.10"
+    - uses: astral-sh/setup-uv@v1
+      with:
+        version: "latest"
     - name: Install dependencies
       run: |
-        python -m pip install uv
         uv sync
     - name: Compile the course
       run: |