[nrf fromlist] wifi: shell: Fix arg count for regulatory domain

Regulatory domain supports both get and set, so, fix the argument
counts.

Upstream PR: zephyrproject-rtos/zephyr#66616

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

subsys/net/l2/wifi/wifi_shell.c

@@ -1684,7 +1684,7 @@ SHELL_STATIC_SUBCMD_SET_CREATE(wifi_commands,
 		"[-f]: Force to use this regulatory hint over any other regulatory hints\n"
 		"Note: This may cause regulatory compliance issues, use it at your own risk.",
 		cmd_wifi_reg_domain,
-		2, 1),
+		1, 1),
 	SHELL_CMD_ARG(mode, NULL, "mode operational setting\n"
 		"This command may be used to set the Wi-Fi device into a specific mode of operation\n"
 		"parameters:"