[dev-context] CGModules update: PresVoz version 2023-08-31 published.

Pablo Rodriguez submitted an update to the PresVoz package. Version number: 2023-08-31 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: 5196bde, log message: new PresVoz ----------------------------------------------------------------------