Note isSecureContext available to workers

Fixes #1192

files/en-us/web/api/window/issecurecontext/index.html

@@ -13,6 +13,7 @@
 <p>The<code> <strong>window.isSecureContext</strong></code> read-only property indicates
   whether a context is capable of using features that require <a
     href="/en-US/docs/Web/Security/Secure_Contexts">secure contexts</a>.</p>
+<p>{{AvailableInWorkers}}</p>
 
 <h2 id="Syntax">Syntax</h2>
 
@@ -39,13 +40,11 @@ <h2 id="Specifications">Specifications</h2>
     <tr>
       <th>Specification</th>
       <th>Status</th>
-      <th>Comment</th>
     </tr>
     <tr>
-      <td>{{SpecName('Secure Contexts')}}</td>
-      <td>{{Spec2('Secure Contexts','#monkey-patching-global-object','isSecureContext')}}
+      <td>{{SpecName('HTML WHATWG')}}</td>
+      <td>{{Spec2('HTML WHATWG','#dom-issecurecontext','isSecureContext')}}
       </td>
-      <td>Initial definition.</td>
     </tr>
   </tbody>
 </table>