[chores] Updated default <title> in base.html template

Author: nemesifier

openwisp_users/accounts/templates/allauth/layouts/base.html

@@ -1,4 +1,4 @@
 {% extends "admin/base_site.html" %}
-{% block title %}OpenWISP2{% endblock %}
+{% block title %}OpenWISP{% endblock %}
 
 {% block breadcrumbs %}{% endblock %}