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/release.yml

@@ -17,7 +17,7 @@ jobs:
       id-token: write
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1

.github/workflows/ruby.yml

@@ -8,7 +8,7 @@ jobs:
 
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
@@ -74,7 +74,7 @@ jobs:
 
     steps:
     - name: Check out repository code
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1