build(deps): bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
@@ -75,7 +75,7 @@ jobs:
           --health-retries 5
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v6
         with:
@@ -112,7 +112,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0
       - name: Fetch all branches
@@ -142,7 +142,7 @@ jobs:
       COMPOSE_FILE: ${{ matrix.db == 'mysql' && 'docker-compose.yml' || (matrix.db == 'postgres' && 'docker-compose-pg.yml') || 'docker-compose-sqlite3.yml' }}
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0
       - name: Set up Python