2023 November releases

[kenodegard]

Description

Announcements for the following to be posted to Discourse (and robo-posted to Matrix):

• [x] conda 23.11.0
• [x] conda-build 3.28.0
• [x] conda-build 3.28.1
• [x] conda-libmamba-solver 23.11.0
• [x] conda-libmamba-solver 23.11.1