doc: nrf70: Fix PSA config option

Now that NCS uses hostap external crypto module, update the Kconfig
option for PSA.

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

Author: krish2718

doc/nrf/app_dev/device_guides/nrf70/wifi_advanced_security_modes.rst

@@ -81,6 +81,6 @@ This improves the security of the nRF70 device compared to the non-PSA mode.
 Enable PSA support
 ==================
 
-To enable the nRF70 PSA crypto support in your applications, use the :kconfig:option:`CONFIG_WIFI_NM_WPA_SUPPLICANT_CRYPTO_ALT_NCS_PSA` Kconfig option.
+To enable the nRF70 PSA crypto support in your applications, use the :kconfig:option:`CONFIG_HOSTAP_CRYPTO_ALT_PSA` Kconfig option.
 
 The Wi-Fi connection process is similar to the non-PSA mode, however, the only difference is that the cryptographic operations are performed using PSA crypto APIs.