chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: Release
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: cucumber/[email protected]
         with:
           rubygems_api_key: ${{ secrets.RUBYGEMS_API_KEY }}
@@ -31,7 +31,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: cucumber/[email protected]
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}