Update required for new UI namespace

[jjw24]

Hey @z1nc0r3 found your theme using the old namespaces http://schemas.modernwpf.com/2019 this will no longer work with Flow v2.1.0. Please update your theme here by following the steps in this PR comment.

Cheers

[z1nc0r3]

Hey @jjw24, thanks for the info. I'll update the theme soon. Cheers!