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

Author: renovate[bot]

.github/workflows/django.yml

@@ -24,7 +24,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.14'
       - name: Setup Node