Fix: Editorial - link Promise<T> type throughout whatwg#9987

Author: tawandamoyo

source

@@ -107493,7 +107493,7 @@ dictionary <dfn dictionary>PromiseRejectionEventInit</dfn> : <span>EventInit</sp
   was initialized to. It represents the promise which this notification is about.</p>
 
   <p class="note">Because of how Web IDL conversion rules for <code
-  data-x="">Promise&lt;<var>T</var>></code> types always wrap the input into a new promise, the
+  data-x=""><a href="https://webidl.spec.whatwg.org/#idl-promise">Promise</a>&lt;<var>T</var>></code> types always wrap the input into a new promise, the
   <code data-x="dom-PromiseRejectionEvent-promise">promise</code> attribute is of type <code
   data-x="idl-object">object</code> instead, which is more appropriate for representing an opaque
   handle to the original promise object.</p>