Exclude old Ruby version with macos-latest

Author: hsbt

.github/workflows/test.yml

@@ -16,6 +16,9 @@ jobs:
       matrix:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
         os: [ ubuntu-latest, macos-latest, windows-latest ]
+        exclude:
+          - os: macos-latest
+            ruby: 2.5
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4