chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
       matrix:
         python-version: ["3.12"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
@@ -39,7 +39,7 @@ jobs:
         python-version: ["3.12"]
         django-version: ["django52"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
@@ -76,7 +76,7 @@ jobs:
       matrix:
         python-version: ["3.12"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}

.github/workflows/migrations-mysql8-check.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6