Update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/macos.yml

@@ -33,7 +33,7 @@ jobs:
           mpv
 
       - name: Set up Python 3.11
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.11"