updated actions/checkout from v4 (Node.js 20) to v5 (Node.js 24)

Author: mtmail

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
         ruby: ["3.1", "3.2", "3.3", "3.4"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}