Enabled IPV6 Address Broadcast

Added to see if this addresses the mdns-discovery issue in Arduino IDE 2.0.0 interface.

src/HomeSpan.cpp

@@ -461,6 +461,8 @@ void Span::checkConnect(){
   Serial.print(WiFi.localIP());
   Serial.print("\n");
 
+  WiFi.enableIpV6();
+
   char id[18];                              // create string version of Accessory ID for MDNS broadcast
   memcpy(id,HAPClient::accessory.ID,17);    // copy ID bytes
   id[17]='\0';                              // add terminating null