UX: fix typo in lazyYT.css (PR #2821)

For some reason my previous PR https://github.com/discourse/discourse/pull/2819 had wrong padding (twice as big). Fixing it (here and upstream at https://github.com/tylerpearson/lazyYT/pull/11) now so that it will look as expected.

My apologies.

GitHub

You’ve signed the CLA, lidel. Thank you! This pull request is ready for review.

thanks