Readme typo

Author: DoImant

README.md

@@ -110,7 +110,7 @@ The ButtonState::pressed status has been added.
 For a long button press with automatic release enabled, the ButtonState::longPressed status is returned once
 when the defined time for a long button press is reached and then the ButtonState::pressed status is returned
 as long as the button is held down.  
-Previously (version 1.1.5), ButtonState::nopressed was returned even if the button had not yet been released.
+Previously (version 1.1.5), ButtonState::notPressed was returned even if the button had not yet been released.
 
 ## Methods