Update ci.yml

Author: thomasrockhu-codecov

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5.0.0-beta
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 2
       - uses: ruby/setup-ruby@v1