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)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [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/build.yml

@@ -26,7 +26,7 @@ jobs:
       reuse_matrix: ${{ steps.matrix.outputs.reuse_matrix }}
     steps:
     - name: Clone ruby
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: ruby/ruby
         path: ruby
@@ -94,7 +94,7 @@ jobs:
     outputs:
       tag: ${{ steps.tag.outputs.tag }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         fetch-depth: 0
       if: github.event_name != 'push'
@@ -135,12 +135,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - name: Clone ruby
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         repository: ruby/ruby
         ref: ${{ matrix.name != '3.4-asan' && needs.prepare.outputs.commit || needs.prepare.outputs.commit_3_4_asan }}
     - name: Clone ruby-dev-builder
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         path: ruby-dev-builder
 
@@ -243,7 +243,7 @@ jobs:
     - run: make test-all TESTS="-j4"
 
     - run: echo "$HOME/.rubies/ruby-${{ matrix.name }}/bin" >> $GITHUB_PATH
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         path: test_files
     - name: CLI Test