Fix image path on notfound page

Author: Simran-B

site/themes/arangodb-docs-theme/layouts/_default/home.notfound.html

@@ -4,7 +4,7 @@
       <div class="flex-block-wrapper">
         <div class="notfound-404">
           <p class="notfound-4">4</p>
-          <img class="notfound-image" src="{{ "images/sad-avocado.png" | relURL }}" alt="Page not found!">
+          <img class="notfound-image" src="{{ "sad-avocado.png" | relURL }}" alt="Page not found!">
           <p class="notfound-4">4</p>
         </div>
         <hgroup>