Update Doc/library/webbrowser.rst

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: secengjeff

Doc/library/webbrowser.rst

@@ -209,7 +209,7 @@ Notes:
 
 .. versionadded:: 3.2
    A new :class:`!MacOSXOSAScript` class has been added
-   and is used on Mac instead of the previous :class:`!MacOS` class.
+   and is used on Mac instead of the previous :class:`!MacOSX` class.
    This adds support for opening browsers not currently set as the OS default.
 
 .. versionadded:: 3.3