Update README.markdown
Update README.markdown

Fix typo
lightmanhk/oh-my-zsh,nunogt/oh-my-zsh,lightmanhk/oh-my-zsh,tekniklr/oh-my-zsh,lightmanhk/oh-my-zsh,tekniklr/oh-my-zsh,nunogt/oh-my-zsh,lightmanhk/oh-my-zsh