There is an updated pull request by sgn against master on the void-packages repository

https://github.com/gspe/void-packages evolution
https://github.com/void-linux/void-packages/pull/27714

evolution: remove deprecated dependency gtkhtml
From evolution git repository https://gitlab.gnome.org/GNOME/evolution/-/blob/master/NEWS
> Evolution now uses WebKitGTK3 also in message composer, the dependency on GtkHTML had been completely dropped.

A patch file from https://github.com/void-linux/void-packages/pull/27714.patch is attached