Here is the patch to update the Unicode data to version 16.0.0.
Normally, this would have been routine, but a few months ago there was
some debate about how this should be handled. [0] AFAICT, the consensus
was to go ahead with it, but I just wanted to notify it here to be clear.
[0]:
https://www.postgresql.org/message-id/flat/d75d2d0d1d2bd45b2c332c47e3e0a67f0640b49c.camel%40j-davis.com