To update your NameServers of your domain registered with KnownHost Login to my.knownhost.com
Click on "Manage" next to the domain name you wish to update
Once you click manage you will be redirected to the below
The next step is to click "NameServers" once you click nameservers you will be redirected to the following below
Enter your new Name Servers once you update your Name Servers click "Update Name Servers" and you will see a success message like the one displayed in the below image.
If you have any questions regarding this don't hesitate to open a ticket by logging into support.knownhost.com