Add git.sr.ht/~eliasnaur/gio to Sourcegraph.com

Created by: sqs

At https://github.com/sourcegraph/sourcegraph/issues/1027#issuecomment-483957854 @eliasnaur requested we add https://git.sr.ht/~eliasnaur/gio to Sourcegraph.com.

I added an OTHER external service with:

{
  // Requested at https://github.com/sourcegraph/sourcegraph/issues/1027#issuecomment-483957854
  "url": "https://git.sr.ht",
  "repos": ["~eliasnaur/gio"]
}

but the repository is not showing up in the site admins repositories list. Any ideas, @keegancsmith @tsenart?