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.yml

@@ -41,7 +41,7 @@ jobs:
           - 5432:5432
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - uses: actions/setup-python@v6
         with:
           python-version: 3.9
@@ -111,7 +111,7 @@ jobs:
         with:
           images: ghcr.io/c2corg/v6_api
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
       - run: git archive --format=tar --output project.tar "$GITHUB_SHA"
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4

.github/workflows/codeql-analysis.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       # Initializes the CodeQL tools for scanning.
       - name: Initialize CodeQL

.github/workflows/create-release.yml

@@ -12,7 +12,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0
       - name: Create or update release