Update the cntlm link to the new fork

• Please check this box if this contribution uses AI-generated content (including content generated by GitLab Duo features) as outlined in the GitLab DCO & CLA. As a benefit of being a GitLab Community Contributor, you receive complimentary access to GitLab Duo.

What does this MR do?

Updates the cntlm link

Why was this MR needed?

The current hyperlink sends you to and archived github repo.

What's the best way to test this MR?

Hit both cntlm github links/ repos and see one is archived with a link to the new one

What are the relevant issue numbers?