Add maintenance_tasks gem

Include [maintenance_tasks](https://rubygems.org/gems/maintenance_tasks) gem to Data Migration category as it is used for data migration

catalog/Data_Persistence/Data_Migration.yml

@@ -3,4 +3,5 @@ description: How to handle data migration when the database schema is changed
 projects:
   - actual_db_schema
   - data_migrate
+  - maintenance_tasks
   - migration_data