don't need to check ruby 2.7/3.0 for rails version that supports new ones

- add ruby 3.3

Author: mathieujobin

.github/workflows/build.yml

@@ -16,10 +16,9 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - '2.7'
-          - '3.0'
           - '3.1'
           - '3.2'
+          - '3.3'
         gemfile:
           - rails_6.0
           - rails_6.1