chore(deps): bump actions/checkout from 3.6.0 to 4.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.6.0 to 4.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3.6.0...v4.0.0)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
       matrix:
         ruby-version: ['2.6', '2.7', '3.0', '3.1', '3.2']
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     name: 'rubocop'
     steps:
-      - uses: actions/checkout@v3.6.0
+      - uses: actions/checkout@v4.0.0
       - uses: ruby/[email protected]
         with:
           ruby-version: .ruby-version

.github/workflows/tagpr.yml

@@ -7,7 +7,7 @@ jobs:
   tagpr:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3.6.0
+    - uses: actions/checkout@v4.0.0
     - uses: Songmu/tagpr@v1
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}