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/database-integration-tests.yml

@@ -55,7 +55,7 @@ jobs:
         remove-docker-images: 'true'
     - id: checkout-code
       name: Checkout code
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
     - id: move-m2-to-workspace
       name: Move Maven local repository to workspace
       shell: bash

.github/workflows/diff-output.yml

@@ -15,7 +15,7 @@ jobs:
 
     - id: checkout-code
       name: Checkout code
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     - id: install-diff2html
       name: Install diff2html

.github/workflows/lint.yml

@@ -20,7 +20,7 @@ jobs:
 # CHECKOUT CODE
     - id: checkout-code
       name: Checkout code
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with:
         # Full git history is needed to get a proper list
         # of changed files within `super-linter`