Merge pull request #28 from pact-foundation/renovate/actions-checkout-4.x

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

Author: YOU54F

.github/workflows/release_gem.yml

@@ -10,7 +10,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - id: release-gem

.github/workflows/test.yml

@@ -11,7 +11,7 @@ jobs:
         ruby_version: ["2.7", "3.0", "3.1", "3.2", "3.3"]
         os: ["ubuntu-latest","windows-latest","macos-latest"]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby_version }}