about.hbs: changed "Community" issues link to less/less.js
about.hbs: changed "Community" issues link to less/less.js

I'm not sure which one was intended but the way it was it encouraged users to create `less.js` issues at the `less-docs` repo. (And I guess then we need additional "Improve Docs" link somewhere at this page).
ownego/lesscss.org.vn