Update fonts.rst, last two fonts were not implemented
The documentation cites 9 fonts, however when accessing fonts by the index the get_font_name method would behave unexpectedly on index 7 & 8, as they seem not to be implemented
The documentation cites 9 fonts, however when accessing fonts by the index the get_font_name method would behave unexpectedly on index 7 & 8, as they seem not to be implemented