📝 Fix typo in docs

optimisations -> optimizations

Author: djkirby

docs/api.md

@@ -88,7 +88,7 @@ export default connect()(TodoApp);
 
 ##### Inject `dispatch` and every field in the global state
 
->Don’t do this! It kills any performance optimisations because `TodoApp` will rerender after every action.  
+>Don’t do this! It kills any performance optimizations because `TodoApp` will rerender after every action.  
 >It’s better to have more granular `connect()` on several components in your view hierarchy that each only  
 >listen to a relevant slice of the state.