MAINTAINERS: update unicode maintainer e-mail address

I no longer have access to this mailbox.  Use kernel.org to avoid
future updates.

Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
This commit is contained in:
Gabriel Krisman Bertazi 2023-12-15 17:09:57 -05:00
commit b837a816b3