Bump actions/checkout from 6.0.2 to 7.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 6.0.2 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@de0fac2...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/exercise-tests.yml

@@ -19,7 +19,7 @@ jobs:
         ruby-version: [3.2, 3.3]
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601

.github/workflows/generator-tests.yml

@@ -12,7 +12,7 @@ jobs:
     name: Check Generator Templates
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
       - name: Set up Ruby
         uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601
         with:
@@ -24,7 +24,7 @@ jobs:
     name: Test Generator
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
       - name: Set up Ruby
         uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601
         with: