[dev-context] CGModules update: Collating marks version 2023.03.23 published.

Willi Egger submitted an update to the Collating marks package. Version number: 2023.03.23 License type: Public Domain Wants to be in ConTeXt distribution: yes Wants to be synced with CTAN: yes Summary description: Environment to place collating marks on the spine of a section Announcement text: ---------------------------------------------------------------------- Revised documentation. Added a README.md ----------------------------------------------------------------------