Update CI matrix

Author: byroot

.github/workflows/ci.yaml

@@ -17,7 +17,7 @@ jobs:
         os: [ubuntu-latest]
         ruby: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4', '3.5', '4.0']
         include:
-          - os: macos-13
+          - os: macos-latest
             ruby: '2.5'
           - os: macos-latest
             ruby: '3.2'