samples: radio_test: Fixing mismatching description

Fixing mismatching description of radio pattern, non-functional change.
User in devzone case 342657 reports this as something he was confused
by.

Signed-off-by: Håkon Elfving <[email protected]>

Author: haedotelf

samples/peripheral/radio_test/src/radio_cmd.c

@@ -1365,7 +1365,7 @@ SHELL_STATIC_SUBCMD_SET_CREATE(sub_transmit_pattern,
 		  "Set the transmission pattern to 11110000.",
 		  cmd_pattern_11110000),
 	SHELL_CMD(pattern_11001100, NULL,
-		  "Set the transmission pattern to 10101010.",
+		  "Set the transmission pattern to 11001100.",
 		  cmd_pattern_11001100),
 	SHELL_SUBCMD_SET_END
 );