Exclude Rails main + Ruby 3.2

It dropped support to Ruby 3.2 which is expected to be EOL by
2026-03-31.

Author: carlosantoniodasilva

.github/workflows/test.yml

@@ -27,6 +27,8 @@ jobs:
             ruby: '3.0'
           - gemfile: Gemfile
             ruby: '2.7'
+          - gemfile: gemfiles/Gemfile-rails-main
+            ruby: '3.2'
           - gemfile: gemfiles/Gemfile-rails-main
             ruby: '3.1'
           - gemfile: gemfiles/Gemfile-rails-main