Editorial: link "a new promise"

Author: bakkot

fetch.bs

@@ -8386,7 +8386,7 @@ partial interface mixin WindowOrWorkerGlobalScope {
 method steps are:
 
 <ol>
- <li><p>Let <var>p</var> be a new promise.
+ <li><p>Let <var>p</var> be [=a new promise=].
 
  <li><p>Let <var>requestObject</var> be the result of invoking the initial value of {{Request}} as
  constructor with <var>input</var> and <var>init</var> as arguments. If this throws an exception,