The only thing I use Godaddy for is to purchase domain names and then point them to my servers, but I’m working on completely removing them from my entire set up altogether… one day…
Anyway, in order to update our name servers you just need to log into your godaddy account, and click “all products” in their nav bar and get into the domain name managers.
Once you see the list of your domains, clicking on one of them or “launch” next to them will open a control panel for that specific domain. In the bottom left corner of the page is the name server settings. click on “update name servers” and select the appropriate option from the list they give you and update accordingly!
Let us know if you have any questions,