[guide] more precisely refer to an "object literal" instead of just a "hash"

Fixes airbnb#1680.

Author: ljharb

README.md

@@ -3170,7 +3170,7 @@ Other Style Guides
 ## Events
 
   <a name="events--hash"></a><a name="24.1"></a>
-  - [25.1](#events--hash) When attaching data payloads to events (whether DOM events or something more proprietary like Backbone events), pass a hash instead of a raw value. This allows a subsequent contributor to add more data to the event payload without finding and updating every handler for the event. For example, instead of:
+  - [25.1](#events--hash) When attaching data payloads to events (whether DOM events or something more proprietary like Backbone events), pass an object literal (also known as a "hash")  instead of a raw value. This allows a subsequent contributor to add more data to the event payload without finding and updating every handler for the event. For example, instead of:
 
     ```javascript
     // bad