MAINTAINERS: Update entry for megachips-stdpxxxx-ge-b850v3-fw

Replace Martin, who has left GE.
Signed-off-by: Ian Ray <ian.ray@ge.com>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230921104751.56544-2-ian.ray@ge.com

MAINTAINERS

@@ -13544,7 +13544,7 @@ F:	drivers/usb/mtu3/
 
 MEGACHIPS STDPXXXX-GE-B850V3-FW LVDS/DP++ BRIDGES
 M:	Peter Senna Tschudin <peter.senna@gmail.com>
-M:	Martin Donnelly <martin.donnelly@ge.com>
+M:	Ian Ray <ian.ray@ge.com>
 M:	Martyn Welch <martyn.welch@collabora.co.uk>
 S:	Maintained
 F:	Documentation/devicetree/bindings/display/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt