drivers: misc: ti-st: Fix a typo ("unknow")

Spell it as "unknown".
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20230129161942.1627267-1-j.neuschaefer@gmx.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/ti-st/st_core.c

@@ -338,7 +338,7 @@ void st_int_recv(void *disc_data,
 			ptr++;
 			count--;
 			continue;
-			/* Unknow packet? */
+			/* Unknown packet? */
 		default:
 			type = *ptr;