ci.yml in pitchfork-0.12.0

- old
+ new

@@ -12,10 +12,10 @@
         os: ["ubuntu-latest"]
         ruby: ["ruby-head", "3.3", "3.2", "3.1", "3.0", "2.7", "2.6"]
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}