use rails 7.2.0 for testing

Appraisals

@@ -5,7 +5,7 @@ appraisals << "7.0.8.4"
 appraisals << "7.1.3.4"
 
 if Gem::Version.new(RUBY_VERSION) > Gem::Version.new("3.1.0")
-  appraisals << "7.2.0.rc1"
+  appraisals << "7.2.0"
 end
 
 appraisals.each do |rails_version|