Fix a typo from PR rails#52807

Author: byroot

activerecord/test/cases/associations/has_many_associations_test.rb

@@ -3253,7 +3253,7 @@ def force_signal37_to_load_all_clients_of_firm
     end
 end
 
-class AsyncHasOneAssociationsTest < ActiveRecord::TestCase
+class AsyncHasManyAssociationsTest < ActiveRecord::TestCase
   include WaitForAsyncTestHelper
 
   self.use_transactional_tests = false