Fix compositionend links (#66)

Before seeing @dontcallmedom 's fix at #63 I introduced a couple more instances of the issue.

Fixing the remaining links.

Author: dandclark

index.html

@@ -701,7 +701,7 @@ <h4><dfn>Update the EditContext</dfn></h4>
                                 <li>Set |editContext|'s [=is composing=] to false.</li>
                                 <li>
                                     [=Fire an event=] named
-                                    <a href="https://w3c.github.io/uievents/#event-type-compositionstart">compositionend</a>
+                                    <a href="https://w3c.github.io/uievents/#event-type-compositionend">compositionend</a>
                                     at |editContext| using {{CompositionEvent}}.
                                 </li>
                                 <li>Return.</li>
@@ -735,7 +735,7 @@ <h4><dfn>Update the EditContext</dfn></h4>
                                 <li>Set |editContext|'s [=is composing=] to false.</li>
                                 <li>
                                     [=Fire an event=] named
-                                    <a href="https://w3c.github.io/uievents/#event-type-compositionstart">compositionend</a>
+                                    <a href="https://w3c.github.io/uievents/#event-type-compositionend">compositionend</a>
                                     at |editContext| using {{CompositionEvent}}.
                                 </li>
                             </ol>