update

source/import_documentation/how-to-use-sib-server.rst

@@ -4,7 +4,7 @@ How to use SiB server
 Once we've `install you server <install-sib-server.html>`__, we now are going to see how to use you it.
 
 Django references
-------------------
+=================
 As SiB server is a DjangoLDP server, you'll need some parts of Django documentation : 
 
     * `The Django models documentation <https://docs.djangoproject.com/fr/2.2/topics/db/models/>`__