Fix: Pysch::DisallowedClass

From what I'm seeing this `Psych::DisallowedClass` error is somewhat
common, I fixed/addressed it by allowiing the classes the error was
complaining about, as show in these links:

- ruby/psych#564
- https://stackoverflow.com/q/71332602
- public-activity/public_activity#374

Refs: #4366

config/application.rb

@@ -58,6 +58,6 @@ class Application < Rails::Application
       only: %r{^/student/downloadable_parental_consent}
 
     config.active_record.schema_format = :sql
-    config.active_record.yaml_column_permitted_classes = [Symbol]
+    config.active_record.yaml_column_permitted_classes = [Symbol, Date, Time, ActiveSupport::TimeZone, ActiveSupport::TimeWithZone]
   end
 end