Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/actions/setup/action.yml

@@ -25,7 +25,7 @@ runs:
   using: "composite"
   steps:
     - name: Set up Python ${{ inputs.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ inputs.python-version }}