Bump actions/checkout from 5 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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/ci.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
@@ -45,7 +45,7 @@ jobs:
       RUBOCOP_CACHE_ROOT: tmp/rubocop
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
@@ -76,7 +76,7 @@ jobs:
     #    options: --health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
@@ -101,7 +101,7 @@ jobs:
     #    options: --health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1