Merge pull request #78 from eclipse-thingweb/danielpeintner-patch-6

Update services.html with new playground location

Author: egekorkan

content/services.html

@@ -21,7 +21,7 @@ <h2>Thing Description Playground</h2>
     </p>
 
     <ul>
-      <li><a href="http://plugfest.thingweb.io/playground/">Online Tool</a></li>
+      <li><a href="https://playground.thingweb.io">Online Tool</a></li>
       <li><a href="https://github.com/eclipse-thingweb/playground">GitHub Repository</a></li>
     </ul>