Update Notes For Aug 20 2026

Summary of changes:

* Some new uv features.
UV Unfold/Texel-Density/Pack, https://youtu.be/ijJ9saW7Ar4
UV Border Merging, https://youtu.be/vUp5cgGjbNk
Bad UV Fixing, https://youtu.be/LZJMK8MeYiI

* Some bug fixings.