ci: 👷 bump setup-uv to v6

Author: iwpnd

.github/actions/setup-python-env/action.yml

@@ -19,7 +19,7 @@ runs:
       python-version: ${{ inputs.python-version }}
 
   - name: Install uv
-    uses: astral-sh/setup-uv@v2
+    uses: astral-sh/setup-uv@v6
     with:
       version: ${{ inputs.uv-version }}
       enable-cache: 'true'