Update dependency @gitlab/ui to ^2.3.0

This MR contains the following updates:

Package	Type	Update	Change	References
@​gitlab/ui	dependencies	minor	^2.2.3 -> ^2.3.0	homepage

/cc @leipert

MR created with the help of leipert-projects/renovate-gitlab-bot

EE port: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/10222

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