Build ruby-3.4.8

Author: ruby-builder-bot

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-22.04, ubuntu-24.04, ubuntu-22.04-arm, ubuntu-24.04-arm, macos-13, macos-14 ]
-        ruby: [ruby-4.0.0-preview2]
+        ruby: [ruby-3.4.8]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4