[dev-context] CGModules update: vim syntax highlighting version 2021.09.05 published.

Aditya Mahajan submitted an update to the vim syntax highlighting package. Version number: 2021.09.05 License type: BSD License (simplified) Wants to be in ConTeXt distribution: yes Wants to be synced with CTAN: yes Summary description: This module uses Vim editor's syntax files to syntax highlight verbatim code in ConTeXt Announcement text: ---------------------------------------------------------------------- Bugfix release: * Fix a typo in t-vim. Vim uses `PreProc` as a group name, but `t-vim` was using `Preproc`. As a result, some elements were not highlighted. Reported by champignoom on github. ----------------------------------------------------------------------