ci: run tests against main ruby 3.4 release

Author: santiagorodriguez96

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - '3.4.0-preview2'
+          - '3.4'
           - '3.3'
           - '3.2'
           - '3.1'