chore(deps): update actions/checkout action to v4 (#57)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/main.yml

@@ -25,7 +25,7 @@ jobs:
       BUNDLE_GEMFILE: Gemfile
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
@@ -36,7 +36,7 @@ jobs:
     name: Rubocop
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 3.2

.github/workflows/release-please.yml

@@ -28,7 +28,7 @@ jobs:
     steps:
       # The logic below handles the npm publication:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ needs.release-please.outputs.release_tag_name }}