[UPD] addons table in README.md

README.md

@@ -21,6 +21,7 @@ addon | version | summary
 [event_product](event_product/) | 8.0.1.0.0 | Combine products and events
 [event_project](event_project/) | 8.0.1.1.0 | Event project
 [event_registration_mass_mailing](event_registration_mass_mailing/) | 8.0.1.0.0 | Mass mailing from events
+[event_registration_seat_limit](event_registration_seat_limit/) | 8.0.4.0.0 | Limit seats per registration
 [event_track_generate](event_track_generate/) | 8.0.2.0.0 | Generate a bunch of event tracks at once
 [partner_event](partner_event/) | 8.0.1.1.0 | Link partner to events
 [website_event_sale_legal](website_event_sale_legal/) | 8.0.1.0.0 | Make attendees to accept legal terms per event