Update draw_text_intro.py (utf8 codecs)

Trying to solve that :
Traceback (most recent call last):
  File "/home/nylnook/Crea/peril-en-daiza/game/draw_text_intro.py", line 68, in write
    blf.draw(font_id, skip.encode('latin1').decode('utf-8'))
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe9 in position 16: invalid continuation byte