Editorial: clarify prepare to run script

This makes it clearer where the currently running task comes from.

Author: annevk

source

@@ -104375,7 +104375,8 @@ document.querySelector("button").addEventListener("click", bound);
    execution context stack</span>; it is now the <span>running JavaScript execution
    context</span>.</p></li>
 
-   <li><p>Add <var>settings</var> to the currently running <span data-x="concept-task">task</span>'s
+   <li><p>Add <var>settings</var> to the <span>surrounding agent</span>'s <span
+   data-x="concept-agent-event-loop">event loop</span>'s <span>currently running task</span>'s
    <span>script evaluation environment settings object set</span>.</p></li>
   </ol>