Add project_settings to high-traffic tables list

As of today, we have around 14 millions records, the size of the table
still acceptable (around 781MB), but this record is created whatever a
new project is created so this table can expect a high-organic traffic
in the future

rubocop/rubocop-migrations.yml

@@ -25,6 +25,7 @@ Migration/UpdateLargeTable:
     - :project_authorizations
     - :projects
     - :project_ci_cd_settings
+    - :project_settings
     - :project_features
     - :push_event_payloads
     - :resource_label_events