Fix minor typo

docs/flux-overview.md

@@ -92,6 +92,6 @@ case 'TODO_CREATE':
   break; 
 ```
 
-The arguments for `waitFor()` are an array of dipatcher registry indexes, and a final callback to invoke after the callbacks at the given indexes have completed.  Thus the store that is invoking `waitFor()` can depend on the state of another store to inform how it should update its own state.
+The arguments for `waitFor()` are an array of dispatcher registry indexes, and a final callback to invoke after the callbacks at the given indexes have completed.  Thus the store that is invoking `waitFor()` can depend on the state of another store to inform how it should update its own state.
 
 A problem arises if we create circular dependencies. If Store A waits for Store B, and B waits for A, then we'll have a very bad situation on our hands. We'll need a more robust dispatcher that flags these circular dependencies with console errors, and this is not easily accomplished with promises. Unfortunately, that's a bit beyond the scope of this documentation. In the future we hope to cover how to build a more robust dispatcher and how to initialize, update, and save the state of the application with persistent data, like a web service API.