Bump actions/checkout from 3 to 4 (#252)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/cruby-build-and-install.yml

@@ -33,7 +33,7 @@ jobs:
           - x64-mingw-ucrt
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: ruby/setup-ruby@v1
         with:

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ jobs:
   rubocop:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 3.2
@@ -26,7 +26,7 @@ jobs:
         rust:
           - stable
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Obtain Rust
       run: rustup override set ${{ matrix.rust }}

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
           - 3.2
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: oxidize-rb/actions/setup-ruby-and-rust@main
         with: