Fix typo `datebase` → `database` in GitHub About

[Marukome0743]

I found a typo in GitHub About section.

Could you update datebase to database?

[jsoref]

@rpdelaney ?

$ gh api https://api.github.com/repos/sharkdp/vivid -q .description
A themeable LS_COLORS generator with a rich filetype datebase

[rpdelaney]

PR welcome!

[jsoref]

@rpdelaney: it isn't possible to make a pull request against repository metadata. if we could, we would, but we can't.

[rpdelaney]

Ah, right. Unfortunately, I don't have those rights on this repo.

[jsoref]

@sharkdp ?