adding ruby 3.4 to test action (#48)

Author: morozgrafix

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4']
 
     steps:
       - uses: actions/checkout@v4