Bump actions/checkout from 6.0.3 to 7.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 6.0.3 to 7.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@df4cb1c...9c091bb)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -25,7 +25,7 @@ jobs:
       RAILS_VERSION: "${{ matrix.rails }}"
 
     steps:
-    - uses: "actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10" # v6.0.3
+    - uses: "actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0" # v7.0.0
 
     - name: "Install NodeJS"
       uses: "actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e" # v6.4.0