fix: Typo fix on Readme.md (#538)

Found a small typo

README.md

@@ -12,7 +12,7 @@ all the functionalities of the regular driver, but add Appium specific methods o
 >
 > The last stable version(v4.3.2) supports the legacy Selenium 3.150.0.<br/>	 
 > In case you would like to use this client with Selenium 4.0 and above, please use the latest beta version(v5.0.0). <br/>
-> We are well aware this project is not activly maintained, therefore any contributors are more than welcomed to assist with this project.
+> We are well aware this project is not actively maintained, therefore any contributors are more than welcomed to assist with this project.
 
 ## NuGet