Bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ohm-tests.yml

@@ -20,7 +20,7 @@ jobs:
       OPENSTREETMAP_MEMCACHE_SERVERS: 127.0.0.1
     steps:
     - name: Checkout source
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Setup ruby
       uses: ruby/setup-ruby@v1
       with: