Update WiFiGeneric.h

Fix compile for CI

Author: mrengineer7777

libraries/WiFi/src/WiFiGeneric.h

@@ -197,8 +197,8 @@ class WiFiGenericClass
     static void useStaticBuffers(bool bufferMode);
     static bool useStaticBuffers();
 
-	const char * ArduinoEventIdToCStr(arduino_event_id_t id);
-	const char * WifiReasonToCStr(wifi_err_reason_t reason);
+    static const char * ArduinoEventIdToCStr(arduino_event_id_t id);
+    static const char * WifiReasonToCStr(wifi_err_reason_t reason);
 
   protected:
     static bool _persistent;