Update dependency @gitlab/ui to v25.4.0

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/ui (source)	dependencies	minor	25.3.0 -> 25.4.0

MR created with the help of gitlab-org/frontend/renovate-gitlab-bot

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Release Notes

gitlab-org/gitlab-ui

v25.4.0

Compare Source

Features

• focus: Initial update to focus state (7e3ba9f)

25.3.1 (2021-01-05)

Bug Fixes

• GlButton: Use multiply for tertiary button (c7b11e0)

Reverts

• GlAlert: alert template changes (b75c897)

v25.3.1

Compare Source

Bug Fixes

• GlButton: Use multiply for tertiary button (c7b11e0)

Reverts

• GlAlert: alert template changes (b75c897)

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