It’s still 1.25.7. The flatpak version is very convenient (if it gets updated).
@hub was probably waiting on the CI to build and complete, but the PR is here: Update to 1.25.8 by hfiguiere · Pull Request #6 · flathub/us.pixls.art.ART · GitHub
Thanks!
Edit: I guess I’m of the impatient type. It’s arrived.