Fixes updated enum states names

README.md

@@ -26,7 +26,7 @@ You need to pass LED GPIO number as a paramater for constructor (see example bel
 You can initialize as many LEDs as you wish by creating as many instances, they all will work async.
 
 ### States:
-You can change the state of the LED by call `Wink(STATE)` method of the instance. STATE is the ENUM which includes ON, OFF, FAST, SLOW states.
+You can change the state of the LED by call `Wink(STATE)` method of the instance. STATE is the ENUM which includes `LED_ON, LED_OFF, LED_FAST, LED_SLOW` states.
 Calling function doesn't hang main thread or make any delay. Changing state(s) will be full async.
 
 You can get current state by calling `GetState()` method.