Update events.md

add link to form loaded

Author: JimDaly

powerapps-docs/developer/model-driven-apps/clientapi/reference/events.md

@@ -27,7 +27,8 @@ Events occur in Custom Engagement forms and grids whenever a form or grid loads,
 
 ## Form events
 
-- [OnLoad](events/form-onload.md)
+- [OnLoad](events/form-onload.md
+- [Loaded](events/form-loaded.md)
 - [OnSave](events/form-onsave.md)
 
 ## Form data event