Update actions/checkout action to v5

Author: renovate[bot]

.github/workflows/main.yml

@@ -23,7 +23,7 @@ jobs:
         django-version: [ "4.2" ]
     steps:
       # Checks-out the  repository.
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55 # v5.5.0