fix(zigbee): Fix typos

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

libraries/Zigbee/examples/Zigbee_Window_Covering/README.md

@@ -1,6 +1,6 @@
-# Arduino-ESP32 Widnow Covering Example
+# Arduino-ESP32 Window Covering Example
 
-This example shows how to configure the Zigbee end device and use it as a Home Automation (HA) window covering or port.
+This example shows how to configure the Zigbee end device and use it as a Home Automation (HA) window covering device.
 
 To see if the communication with your Zigbee network works, use the Serial monitor and watch for output there.
 

libraries/Zigbee/examples/Zigbee_Window_Covering/Zigbee_Window_Covering.ino

@@ -19,7 +19,7 @@
  * The window covering is a Zigbee end device, which is moving the blinds (lift+tilt) and reporting 
  * its current position to the Zigbee network.
  * 
- * Use setCoveingType() to set the type of covering (blind, shade, etc.).
+ * Use setCoveringType() to set the type of covering (blind, shade, etc.).
  * 
  * The example also demonstrates how to use the button to manually control the lift position.
  *