MAINTAINERS: add entry for min heap library code

MAINTAINERS: add entry for min heap library code

Add a new entry in the MAINTAINERS file for the min heap library code,
with myself as the maintainer.  I am pleased to take on the responsibility
of maintaining and reviewing patches for this library, as I am
well-acquainted with its details through recent contributions.

Link: https://lkml.kernel.org/r/20241027004003.987934-1-visitorckw@gmail.com
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Cc: Kuan-Wei Chiu <visitorckw@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>