Update 404.html

docs-2.0-en/overrides/404.html

@@ -3,10 +3,10 @@
   {% block content %}
     <h2>Sorry, the page is invalid...</h2>
 
-    <p>Click the edit button in the upper right corner of the <a href="javascript:history.back(-3)">original document</a> to fix the invalid link and become a contributor.</p>
+    <p>Click the edit button in the upper right corner of the <a href="javascript:history.back(-2)">original document</a> to fix the invalid link and become a contributor.</p>
     <p>You can also:</p>
     <p><a href="https://github.com/vesoft-inc/nebula-docs/issues/new">Submit an issue</a> about the invalid link.</p>
-    <p><a href="javascript:history.back(-3)">Return to the previous page.</a></p>
+    <p><a href="javascript:history.back(-2)">Return to the previous page.</a></p>
     <p><a href="/">Return to the home page.</a></p>
   {% endblock %}
   {% block disqus %}{% endblock %}