Following T359312: Create cu_useragent table and T361140: Add user agent ID column to each CheckUser result table, https://www.mediawiki.org/wiki/Extension:CheckUser needs to be updated with the database changes made which includes creating a new page for the cu_useragent table.
Acceptance criteria
- Create https://www.mediawiki.org/wiki/Extension:CheckUser/cu_useragent_table
- Update https://www.mediawiki.org/wiki/Extension:CheckUser/cu_changes_table, https://www.mediawiki.org/wiki/Extension:CheckUser/cu_log_event_table, and https://www.mediawiki.org/wiki/Extension:CheckUser/cu_private_event_table
- Update https://www.mediawiki.org/wiki/Extension:CheckUser