Update revision history

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@@ -1006,6 +1006,7 @@ <h1>Revision History</h1>
         <p>The following is an informative summary of substantial and major editorial changes between publications of this specification, relative to the first [[PointerEvents]] specification. See the <a href="https://github.com/w3c/pointerevents/commits">complete revision history of the Editor's Drafts of this specification</a>.</p>
         <h3>Changes since the 24 February 2015 Recommendation</h3>
         <ul>
+            <li><a href="https://github.com/w3c/pointerevents/pull/234">Added note about legacy attributes <code>fromElement</code> and <code>toElement</code> (inherited from MouseEvents) must be <code>null</code></a></li>
             <li><a href="https://github.com/w3c/pointerevents/pull/218">Add [Exposed=Window] to Constructor</a></li>
             <li><a href="https://github.com/w3c/pointerevents/pull/138">Don't send boundary events during capture</a></li>
             <li><a href="https://github.com/w3c/pointerevents/pull/129">Implicit capture for direct manipulation pointing devices</a></li>