chore(deps): update actions/setup-python action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -80,7 +80,7 @@ jobs:
         uses: astral-sh/setup-uv@v6
 
       - name: 🐍 Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: 3.12