Corrected link in README.

Author: freakboy3742

README.rst

@@ -71,7 +71,7 @@ will be in the `dist` directory.
 
 .. _for iOS: https://github.com/pybee/Python-iOS-support/releases/download/3.4.2-b4/Python-3.4.2-iOS-support.b4.tar.gz
 .. _for tvOS: https://github.com/pybee/Python-iOS-support/releases/download/3.4.2-b4/Python-3.4.2-iOS-support.b4.tar.gz
-.. _for watchS: https://github.com/pybee/Python-iOS-support/releases/download/3.4.2-b4/Python-3.4.2-iOS-support.b4.tar.gz
+.. _for watchOS: https://github.com/pybee/Python-iOS-support/releases/download/3.4.2-b4/Python-3.4.2-iOS-support.b4.tar.gz
 
 Acknowledgements
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