Fixed the issue that the wifi configuration saved to RAM did not take effect. (#5925)

Co-authored-by: virgil <virgil.wang.cj@gmail.com>

src/mesh/wifi/WiFiAPClient.cpp

@@ -225,7 +225,7 @@ bool initWifi()
 #if !MESHTASTIC_EXCLUDE_WEBSERVER
         createSSLCert(); // For WebServer
 #endif
-        esp_wifi_set_storage(WIFI_STORAGE_RAM); // Disable flash storage for WiFi credentials
+        WiFi.persistent(false); // Disable flash storage for WiFi credentials
 #endif
         if (!*wifiPsw) // Treat empty password as no password
             wifiPsw = NULL;