net: wifi: shell: add 80211R usage in connect command

Add 80211R fast BSS transition argument usage in connect command.

Signed-off-by: Fengming Ye <frank.ye@nxp.com>

Author: fengming-ye

subsys/net/l2/wifi/wifi_shell.c

@@ -3237,6 +3237,7 @@ SHELL_SUBCMD_ADD((wifi), connect, &wifi_commands,
 		  "[-I, --eap-id1]: Client Identity. Default no eap identity.\n"
 		  "[-P, --eap-pwd1]: Client Password.\n"
 		  "Default no password for eap user.\n"
+		  "[-R, --ieee-80211r]: Use IEEE80211R fast BSS transition connect."
 		  "[-h, --help]: Print out the help for the connect command.\n",
 		  cmd_wifi_connect,
 		 2, 19);