MAINTAINERS: remove myself as a VKMS maintainer

I haven't been able to follow or review the work on the driver for some
time now and I don't see the situation improving anytime soon. I'd like
to continue being listed as a reviewer.

Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Acked-by: Maíra Canal <mcanal@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240525142637.82586-1-melissa.srw@gmail.com

MAINTAINERS

@@ -7341,10 +7341,10 @@ F:	drivers/gpu/drm/udl/
 
 DRM DRIVER FOR VIRTUAL KERNEL MODESETTING (VKMS)
 M:	Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
-M:	Melissa Wen <melissa.srw@gmail.com>
 M:	Maíra Canal <mairacanal@riseup.net>
 R:	Haneen Mohammed <hamohammed.sa@gmail.com>
 R:	Daniel Vetter <daniel@ffwll.ch>
+R:	Melissa Wen <melissa.srw@gmail.com>
 L:	dri-devel@lists.freedesktop.org
 S:	Maintained
 T:	git https://gitlab.freedesktop.org/drm/misc/kernel.git