Fixed linter error
Fixed linter error

refs https://github.com/TryGhost/Admin/commit/235fcb4903b9abc81e443032c68b0a7bdb07b0f0

- commit snuck in between merge of eslint update with fixes applied
- ran `yarn lint:js --fix` again

TryGhost/Ghost,TryGhost/Ghost,TryGhost/Ghost