update documentation

Author: troosan

docs/styles.rst

@@ -61,7 +61,7 @@ Available Font style options:
 - ``lang``. Language, either a language code like *en-US*, *fr-BE*, etc. or an object (or as an array) if you need to set eastAsian or bidirectional languages
    See ``\PhpOffice\PhpWord\Style\Language`` class for some language codes.
 - ``position``. The text position, raised or lowered, in half points
-- ``hiddenText``. Hidden text, *true* or *false*.
+- ``hidden``. Hidden text, *true* or *false*.
 
 .. _paragraph-style: