added lottie for 404 page

sections/main-404.liquid

@@ -11,6 +11,16 @@
 </style>
 
 <div class="template-404 page-width page-margin center">
+  <dotlottie-player
+    id="SHX-feedback-modal-lottie2"
+    src="{{ 'lottie_404.lottie' | asset_url }}"
+    background="transparent"
+    speed="1"
+    loop="true"
+    style="width: 300px; height: 300px; margin: 0 auto;"
+    direction="1"
+    mode="bounce"></dotlottie-player>
+
   <p>
     {{ 'templates.404.subtext' | t }}
   </p>