fixed WebBaseURL for RT

roles/rt4/templates/rt4.pm.j2

 # Set the Organization name and our public URL.
 Set($rtname, '{{ helpdesk_app_name }}');
-Set($WebBaseURL , 'https://helpdesk.autistici.org/rt/');
+Set($WebBaseURL , 'https://helpdesk.autistici.org');
 Set($Organization, '{{ helpdesk_organization }}');
 Set($WebDomain, 'helpdesk.{{ domain_public[0] }}');
 Set($WebPort, 443);