fix(toolbox): fix typo in action type for hide timeout (#4069)

react/features/toolbox/actionTypes.js

@@ -91,7 +91,7 @@ export const SET_TOOLBOX_TIMEOUT = 'SET_TOOLBOX_TIMEOUT';
  *     timeoutMS: number
  * }
  */
-export const SET_TOOLBOX_TIMEOUT_MS = 'SET_TOOLBOX_TIMEOUT';
+export const SET_TOOLBOX_TIMEOUT_MS = 'SET_TOOLBOX_TIMEOUT_MS';
 
 /**
  * The type of the (redux) action which shows/hides the Toolbox.