Bump actions/checkout from 3 to 4 in the gh-actions group (#1)

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

Author: dependabot[bot]

.github/workflows/ruby.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         ruby-version: ['3.3']
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: