MAINTAINERS: Update AD7192 driver maintainer

Alexandru Tachici has not been active. Also the email address included
is not reachable anymore. I was assigned to work on the driver instead.

Remove Alexandru Tachici and add myself as maintainer of AD7192 driver.

Signed-off-by: Alisa-Dariana Roman <[e-mail]>
Reviewed-by: Conor Dooley <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

MAINTAINERS

···
 F:	drivers/iio/adc/ad7091r*
 
 ANALOG DEVICES INC AD7192 DRIVER
-M:	Alexandru Tachici <[e-mail]>
+M:	Alisa-Dariana Roman <[e-mail]>
 L:	[e-mail]
 S:	Supported
 W:	https://ez.analog.com/linux-software-drivers