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>

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
         ruby: [ruby-3.3.12]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - name: Set platform
       id: platform
       run: |
@@ -130,7 +130,7 @@ jobs:
         jruby-version: [10.0.6.0]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - name: Set platform
       id: platform
       run: |

.github/workflows/check-new-releases.yml

@@ -8,17 +8,17 @@ jobs:
   check_new_releases:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0
         token: ${{ secrets.PUSH_TO_MASTER_TOKEN }}
     - name: Clone setup-ruby
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with:
         repository: ruby/setup-ruby
         path: setup-ruby
     - name: Clone ruby-build
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with:
         repository: rbenv/ruby-build
         path: ruby-build

.github/workflows/copy.yml

@@ -5,7 +5,7 @@ jobs:
   copy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: '3.4'