[dev-context] CGModules update: PresVoz version 2021-12-19 published.

Pablo Rodriguez submitted an update to the PresVoz package. Version number: 2021-12-19 License type: GNU General Public License Wants to be in ConTeXt distribution: yes Wants to be synced with CTAN: no Summary description: Generating presentations with voice. Announcement text: ---------------------------------------------------------------------- Remote revision: ed85f22, log message: proportional loader button ----------------------------------------------------------------------