emacs-28 191505b8a3: Mention that src/macuvs.h sometimes needs committing

[Robert Pluim]

branch: emacs-28
commit 191505b8a3a450e4b5658f90913c8e201517be98
Author: Robert Pluim <rpluim@gmail.com>
Commit: Robert Pluim <rpluim@gmail.com>

    Mention that src/macuvs.h sometimes needs committing
    
    * admin/notes/unicode: src/macuvs.h is generated, but needs to be
    committed sometimes.
---
 admin/notes/unicode | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/admin/notes/unicode b/admin/notes/unicode
index 7b86a36a14..6d443f3c4e 100644
--- a/admin/notes/unicode
+++ b/admin/notes/unicode
@@ -88,6 +88,10 @@ modified to follow suit.  If there's trailing whitespace in
 BidiCharacterTest.txt, it should be removed before committing the new
 version.
 
+src/macuvs.h is a generated file, but if it has changed as a result
+of the updates, please commit it as well (see
+admin/unidata/Makefile.in for an explanation).
+
 Visit "emoji-data.txt" with the rebuilt Emacs, and check that an
 appropriate font is being used for the emoji (by default Emacs uses
 "Noto Color Emoji").  Running the following command in that buffer