Editorial: use "current settings object" for importScripts

Since we are inside a worker, current/incumbent/entry/relevant are all
equivalent. Helps with #1430.

Author: domenic

source

@@ -96852,7 +96852,7 @@ interface <dfn>NavigatorConcurrentHardware</dfn> {
    data-x="concept-WorkerGlobalScope-type">type</span> is "<code data-x="">module</code>", throw a
    <code>TypeError</code> exception and abort these steps.</p></li>
 
-   <li><p>Let <var>settings object</var> be the <span>incumbent settings object</span>.</p></li>
+   <li><p>Let <var>settings object</var> be the <span>current settings object</span>.</p></li>
 
    <li><p>If <var>urls</var> is empty, abort these steps.</p></li>