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] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
       url: ${{ steps.url.outputs.url }}
     steps:
     - name: Clone to get find-jruby-head-url-nokogiri.rb
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ruby
@@ -50,7 +50,7 @@ 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'
@@ -105,7 +105,7 @@ jobs:
 
     # Build
     - name: Clone to get test/Gemfile
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Download latest jruby nightly archive
       shell: bash
       run: curl --fail -L -o jruby-head.tar.gz "${{ needs.prepare.outputs.url }}"