Added Navigation buttons for training modules 1 to 6

Author: Philipsty

content/en/docs/tutorials/kubernetes-basics/update/update-interactive.html

@@ -26,7 +26,7 @@
         </div>
         <div class="row">
             <div class="col-md-12">
-            	<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/scale/scale-interactive/" role="button">Return to Module 5<span class="btn__next">›</span></a>
+               <a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/scale/scale-interactive/" role="button">Return to Module 5<span class="btn__next">›</span></a>
                <a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/" role="button">Return to Kubernetes Basics<span class="btn__next">›</span></a>
             </div>
         </div>