Build ruby-2.7.8

Author: eregon

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-26.04, ubuntu-26.04-arm ]
-        ruby: [ ruby-1.9.3-p551, ruby-2.0.0-p648, ruby-2.1.9, ruby-2.2.10, ruby-2.3.8, ruby-2.4.10, ruby-2.5.9, ruby-2.6.10, ruby-2.7.8, ruby-3.0.7, ruby-3.1.7 ]
+        ruby: [ruby-2.7.8]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v6