📝 Fix comment

Marlin/Configuration_adv.h

 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */
-//#define WIFISUPPORT         // Marlin embedded WiFi managenent
+//#define WIFISUPPORT         // Marlin embedded WiFi management
 //#define ESP3D_WIFISUPPORT   // ESP3D Library WiFi management (https://github.com/luc-github/ESP3DLib)
 
 #if EITHER(WIFISUPPORT, ESP3D_WIFISUPPORT)