fix(zigbee): fix serial and add missing factoryReset to example

Author: P-R-O-C-H-Y

Diff for: libraries/Zigbee/examples/Zigbee_Color_Dimmer_Switch/Zigbee_Color_Dimmer_Switch.ino

@@ -145,6 +145,6 @@ void loop() {
   static uint32_t last_print = 0;
   if (millis() - last_print > 30000) {
     last_print = millis();
-    zbSwitch.printBoundDevices();
+    zbSwitch.printBoundDevices(Serial);
   }
 }

Diff for: libraries/Zigbee/examples/Zigbee_On_Off_Switch/Zigbee_On_Off_Switch.ino

@@ -190,6 +190,6 @@ void loop() {
   static uint32_t lastPrint = 0;
   if (millis() - lastPrint > 10000) {
     lastPrint = millis();
-    zbSwitch.printBoundDevices(&Serial);
+    zbSwitch.printBoundDevices(Serial);
   }
 }

Diff for: libraries/Zigbee/examples/Zigbee_Temp_Hum_Sensor_Sleepy/Zigbee_Temp_Hum_Sensor_Sleepy.ino

@@ -128,6 +128,7 @@ void loop() {
         // If key pressed for more than 3secs, factory reset Zigbee and reboot
         Serial.println("Resetting Zigbee to factory and rebooting in 1s.");
         delay(1000);
+        Zigbee.factoryReset();
       }
     }
   }