Validates on ruby@3.4 for tools running on the same minor version

Author: donk-shopify

.github/workflows/ruby.yml

@@ -30,7 +30,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, ubuntu-latest]
-        ruby-version: ['3.1', '3.2', '3.3']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4']
 
     runs-on: ${{ matrix.os }}
     env: