This is a relatively minor change.

This does not result in changes to go.text/unicode/norm. The go.text
packages will therefore be relatively unaffected. It does make the
way for an upgrade to CLDR 24, though.

The tests of all.bash pass, as well as the tests in go.text after
this update.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/65400044