fix joseph typo

Author: stevekrouse

episodes/19-building-universe-joe-cohen.html

@@ -121,7 +121,7 @@ <h4>Demos</h4>
     <div>
       <h4>Notes</h4>
       <ul>
-        <li>Contact via joeseph at onuniverse.com</li>
+        <li>Contact via joseph at onuniverse.com</li>
         <li><a href="https://building.onuniverse.com">Universe Blog</a></li>
         <li><a href="https://itunes.apple.com/us/app/universe-build-a-website/id1211437633?mt=8">Universe for iPhone</a></li>
         <li><a href="http://osxdaily.com/2017/05/27/run-hypercard-macos-web-browser-emu">Hypercard</a></li>