Update docs screenshots for scoped labels
Problem to solve
At the moment, the docs are presenting the premium feature of scoped labels without showing that they have a split colour.
Link to scoped labels docs for reference: https://docs.gitlab.com/ee/user/project/labels.html#scoped-labels
How scoped labels should look in screenshots:
We need to update those screenshots for two reasons:
- better advertising of this feature for users that are pondering on switching to premium
- reduced confusion for users that see one thing in their UI and another in the docs