Add Tim Bray to about

OpenKeychain/src/main/res/raw/help_about.html

@@ -23,6 +23,7 @@ And don't add newlines before or after p tags because of transifex -->
 <li>Paul Sarbinowski</li>
 <li>Sreeram Boyapati</li>
 <li>Vincent Breitmoser</li>
+<li>Tim Bray</li>
 </ul>
 
 <h2>Developers APG 1.x</h2>