Fix welcome page

Author: bgruening

galaxy/welcome.html

@@ -15,13 +15,13 @@ <h2>Hello, your <strong>Galaxy Docker</strong> container is running!</h2>
             <br>
             <a target="_blank" href="https://wiki.galaxyproject.org/Admin/Config" class="btn btn-primary btn-lg">Configuring Galaxy »</a>
             <a target="_blank" href="https://wiki.galaxyproject.org/Admin/Tools/AddToolFromToolShedTutorial" class="btn btn-primary btn-lg">Installing Tools »</a>
-            <a target="_parent" href="../tours/core.galaxy_ui" class="btn btn-primary btn-lg">Guided Tour »</a>
+            <a target="_parent" href="/tours/core.galaxy_ui" class="btn btn-primary btn-lg">Guided Tour »</a>
             </td><td>
                 <div align=center>
                     <img src="./welcome_image.png" width="90%" height="90%" />
                 </div>
 
-</td></tr></table>
+        </td></tr></table>
         </div>
     </div>