Fix md link to UD tpls

[devidw]

Pull Request

Contribution type

• [ ] New template contribution
• [ ] Existing template update
• [ ] Issue fix
• [X] README.md update

Contribution Description

i.e. files updated, new template(s) added, bugs fixed, etc.

[ ] I would like my template to be added to the Unstoppable Domains' website builder

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