Ui/navigation (#173)

* Hugo rebuild all branches

* Added navigation

* Hugo rebuild all branches

* adde navigation

* Hugo rebuild all branches

Author: shrutika2110

published/categories/index.html

@@ -314,7 +314,7 @@ <h2 class="text-center">More resources</h2>
                 <div class="row justify-content-center u-align__stretch-bottom">
     				<div class="col-12 col-sm-6 col-md-3 text-center">
     					<div class="section-icon">
-                            <img src="https://dgraph.io/assets/images/icon-fast-forward.svg">
+    						<img src="https://dgraph.io/assets/images/icon-docs.svg">
                         </div>
     					<h3>Docs</h3>
     					<p class="u-align__center" style="max-width:320px;">Get detailed information on how to get started with Dgraph.</p>
@@ -347,8 +347,7 @@ <h3>Forum</h3>
                     </div>
                     <div class="col-12 col-sm-6 col-md-3 text-center">
                         <div class="section-icon">
-                            <img src="https://dgraph.io/assets/images/icon-docs.svg">
-
+    						<img src="https://dgraph.io/assets/images/icon-fast-forward.svg">
                         </div>
     					<h3>Play</h3>
     					<p class="u-align__center" style="max-width:320px;">Easily query and visualize your data in an easy to use web interface.</p>