[PATCH] MAINTAINERS: update Tzung-Bi's email address

[Tzung-Bi Shih]

On Mon, Oct 24, 2022 at 07:30:48PM -0700, Chen-Yu Tsai wrote:
> On Mon, Oct 24, 2022 at 7:06 PM Tzung-Bi Shih <tzungbi at kernel.org> wrote:
> >
> > Use kernel.org account instead.
> >
> > Signed-off-by: Tzung-Bi Shih <tzungbi at kernel.org>
> 
> You could also update .mailmap?

Thanks.  Update in v2.