Add Squarspace to DNS challenge list

[mchhil-incomm]

Is your feature request related to a problem? Please describe.

I use squarespace as a DNS provider. They took over the dns management from from google.

Describe the solution you'd like

The dropdown for dns challenge does not include squarespace. I would request the functionality to be added.

Describe alternatives you've considered

Trying to go without the dns challenge but it does not allow wild card domain

[github-actions]

Issue is now considered stale. If you want to keep it open, please comment 👍