samples: net: wifi: fix the value of NXP_WIFI_DRIVER_TASK_STACK_SIZE

Fix the typo that NXP_WIFI_DRIVER_TASK_STACK_SIZE has wrong value in
the overlay_rw612_debug.conf.

Signed-off-by: Maochen Wang <maochen.wang@nxp.com>

Author: MaochenWang1

samples/net/wifi/shell/nxp/overlay_rw612_debug.conf

@@ -17,7 +17,7 @@ CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
 CONFIG_ZPERF_WORK_Q_STACK_SIZE=4096
 CONFIG_MAIN_STACK_SIZE=4096
 CONFIG_IDLE_STACK_SIZE=2048
-CONFIG_NXP_WIFI_DRIVER_TASK_STACK_SIZE=409
+CONFIG_NXP_WIFI_DRIVER_TASK_STACK_SIZE=4096
 
 # net
 CONFIG_NET_BUF_POOL_USAGE=y