Update doc

Author: StevenRenaux

src/Icons/doc/index.rst

@@ -124,7 +124,7 @@ the parent element.
         {{ ux_icon('bi:star') }}
     </a>
 
-You can set the icon’s color using CSS classes, either on the parent container or directly on the icon:
+You can set the icon's color using CSS classes, either on the parent container or directly on the icon:
 
 .. code-block:: html+twig