Corrected typo in README

Author: Gianluca Carnielli

README.md

@@ -2,7 +2,7 @@
 
 Version: 1.0
 
-This custom UI component creates a button that is customizable in several additional ways with respect to the built-in ``uibutton`` component in MATLAB®. Additional customizations can be addeed with JavaScript® and CSS. This custom component can be included inside graphical user interfaces and be made available inside App Designer.
+This custom UI component creates a button that is customizable in several additional ways with respect to the built-in ``uibutton`` component in MATLAB®. Additional customizations can be added with JavaScript® and CSS. This custom component can be included inside graphical user interfaces and be made available inside App Designer.
 
 <img src="images/button_example.png" width="200">