can: gs_usb: mention candleLight as supported device

To make it easier for new users to find the correct driver for
candleLight compatible CAN-USB devices mention candleLight in the
driver's Kconfig input prompt.

Link: https://lore.kernel.org/all/20221019205037.1600936-1-mkl@pengutronix.de


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>