change asserts name to fix update issue (not updated by RTD cache)

Author: NicolasMassart

…ustom_theme/assets/javascripts/custom.js …theme/assets/javascripts/custom_theme.jsdocs/custom_theme/assets/javascripts/custom.js renamed to docs/custom_theme/assets/javascripts/custom_theme.js docs/custom_theme/assets/javascripts/custom.js renamed to docs/custom_theme/assets/javascripts/custom_theme.js

@@ -1,14 +1,14 @@
 {% extends "base.html" %}
 
 {% block extrahead %}
-  <link rel="stylesheet" href="{{ 'assets/stylesheets/custom.css' | url }}">
+  <link rel="stylesheet" href="{{ 'assets/stylesheets/custom_theme.css' | url }}">
   <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.6.1/css/all.css" integrity="sha384-gfdkjb5BdAXd+lj+gudLWI+BXq4IuLW5IT+brZEZsLFm++aCMlF1V92rMkPaX4PP" crossorigin="anonymous">
   <script
       src="https://code.jquery.com/jquery-1.12.4.min.js"
       integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ="
       crossorigin="anonymous"></script>
   <script async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-MML-AM_CHTML"></script>
-  <script src="{{ 'assets/javascripts/custom.js' | url }}"></script>
+  <script src="{{ 'assets/javascripts/custom_theme.js' | url }}"></script>
   {% if config.extra.google.site_verification %}
     <!-- Google site verification for search console -->
     <meta name="google-site-verification" content="{{config.extra.google.site_verification}}" />