Merge PR pyapp-kit#116: ci(dependabot): bump actions/setup-python from 5 to 6

Author: tlambert03

.github/workflows/ci.yml

@@ -73,7 +73,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.12
       - name: Install package and dev dependencies