correct faulty url (#137)

Author: Bolukan

docs/1.-Getting-started.md

@@ -19,7 +19,7 @@ AsyncMqttClient has 1 dependency: [ESPAsyncTCP](https://github.com/me-no-dev/ESP
 
 ## Fully-featured sketch
 
-See [examples/FullyFeatured.ino](../examples/FullyFeatured/FullyFeatured.ino)
+See [examples/FullyFeatured-ESP8266.ino](../examples/FullyFeatured-ESP8266/FullyFeatured-ESP8266.ino)
 
 **<u>Very important:</u> As a rule of thumb, never use blocking functions in the callbacks (don't use `delay()` or `yield()`).** Otherwise, you may very probably experience unexpected behaviors.