Fix example in HTMLElement constructor steps

The initial value of this variable in the example made it so that the branch in the constructor we were trying to exemplify would never actually be hit.

source

@@ -11289,7 +11289,7 @@ document.createElement("bad-1");  // (2)</code></pre>
      instance of the class being constructed, before calling <code
      data-x="">super()</code>:</p>
 
-     <pre><code class="js">let doSillyThing = false;
+     <pre><code class="js">let doSillyThing = true;
 
 class DontDoThis extends HTMLElement {
   constructor() {
@@ -129421,6 +129421,7 @@ INSERT INTERFACES HERE
   Liviu Tinta,
   Lobotom Dysmon,
   Logan<!-- on moz irc -->,
+  Logan Moore,
   Loune,
   Lucas Gadani,
   &#x0141;ukasz Pilorz,