Bump actions/checkout from 3 to 4 (#413)

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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Kylee Fields <[email protected]>

.github/workflows/brakeman.yml

@@ -33,7 +33,7 @@ jobs:
     steps:
     # Checkout the repository to the GitHub Actions runner
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Customize the ruby version depending on your needs
     - name: Setup Ruby

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
           --health-timeout 5s
           --health-retries 5
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true
@@ -59,7 +59,7 @@ jobs:
     env:
       BUNDLE_ONLY: linting
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         bundler-cache: true