chore(docs): fix typo
chore(docs): fix typo

https://github.com/textlint/textlint/pull/161#discussion_r56270048

1000ch/textlint,t-ashula/textlint,textlint/textlint,textlint/textlint,textlint/textlint,1000ch/textlint,1000ch/textlint,textlint/textlint