Update migration.mdx

Author: davidkpiano

docs/migration.mdx

@@ -498,7 +498,7 @@ const machine = createMachine({
 </TabItem>
 </Tabs>
 
-**Pre-migration tip:** Update v4 projects to include a `params` object on [event objects](#actorsend-no-longer-accepts-string-types) passed to `.send()`.
+**Pre-migration tip:** Update action and guard objects on v4 projects to move properties (other than `type`) to a `params` object.
 
 ### Use wildcard `*` transitions, not strict mode