Relativize some markdown links to fix assets for the guide.
Relativize some markdown links to fix assets for the guide.

google/codeworld,tgdavies/codeworld,google/codeworld,pranjaltale16/codeworld,alphalambda/codeworld,alphalambda/codeworld,tgdavies/codeworld,alphalambda/codeworld,google/codeworld,tgdavies/codeworld,pranjaltale16/codeworld,pranjaltale16/codeworld