MAINTAINERS: Update FPGA MANAGER maintainer

Hao's email no longer works. Remove it from MAINTAINERS. Yilun takes
over his maintainer entry.

Signed-off-by: Xu Yilun <yilun.xu@linux.intel.com>
Link: https://lore.kernel.org/r/20250711183704.1788255-1-yilun.xu@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>