Use pyproject.toml to select python version in CI

Author: medihack

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version-file: ".python-version"
+          python-version-file: "pyproject.toml"
       - name: Install dependencies
         run: uv sync
       - name: Configure environment