chore: update ci

Author: Timon Viola

.github/workflows/ci.yaml

@@ -12,6 +12,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
+    - name: Install uv
+      uses: astral-sh/setup-uv@v5
     - uses: actions/setup-python@v3
     - name: Set up pip cache
       if: runner.os == 'Linux'