Set python version with uv action correctly.

Author: tobiasraabe

.github/workflows/main.yml

@@ -43,14 +43,12 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Install uv
-        uses: astral-sh/setup-uv@v4
+      - uses: astral-sh/setup-uv@v6
         with:
           enable-cache: true
+          python-version: ${{ matrix.python-version }}
       - name: Install just
         uses: extractions/setup-just@v2
-      - name: Set up Python ${{ matrix.python-version }}
-        run: uv python install ${{ matrix.python-version }}
 
       - name: Run tests
         shell: bash -l {0}