Revision 554056

graphics/nomacs: update to 3.16

From ChangeLog: https://nomacs.org/nomacs-3-16/

 * AVIF support
 * CR3, PCX support
 * image editing: blurring added
 * plugins: adds composite plugin
 * windows: new multi-user installer
 * adds default system theme
 * flatpak: adds plugins

PR:	250757
Submitted by:	vidar@karlsen.tech (maintainer)