MAINTAINERS: Update Loic Poulain's email address

Update Loic Poulain's email address to @oss.qualcomm.com.

Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250401145344.10669-1-loic.poulain@oss.qualcomm.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>