Edit IP Whitelabel to Reverse DNS

Signed-off-by: chandler <[email protected]>

Author: crweiner

USAGE.md

@@ -4247,7 +4247,7 @@ Each subuser should be assigned to an IP address, from which all of this subuser
 More information:
 
 * [How to request more IPs](https://sendgrid.com/docs/Classroom/Basics/Account/adding_an_additional_dedicated_ip_to_your_account.html)
-* [IPs can be whitelabeled](https://sendgrid.com/docs/User_Guide/Settings/Whitelabel/ips.html)
+* [How to set up reverse DNS](https://sendgrid.com/docs/ui/account-and-settings/how-to-set-up-reverse-dns/)
 
 ### PUT /subusers/{subuser_name}/ips