media: MAINTAINERS: update rksip1 maintainers info

Due to changes in maintainers info/position
Signed-off-by: Dafna Hirschfeld <dafna@fastmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

MAINTAINERS

@@ -16635,8 +16635,7 @@ F:	Documentation/devicetree/bindings/sound/rockchip,i2s-tdm.yaml
 F:	sound/soc/rockchip/rockchip_i2s_tdm.*
 
 ROCKCHIP ISP V1 DRIVER
-M:	Helen Koike <helen.koike@collabora.com>
-M:	Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
+M:	Dafna Hirschfeld <dafna@fastmail.com>
 L:	linux-media@vger.kernel.org
 L:	linux-rockchip@lists.infradead.org
 S:	Maintained