Update dependency @gitlab/ui to v66.7.0

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/ui	dependencies	minor	66.4.0 -> 66.7.0

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

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Context

In gitlab-ui!3564 (merged) we fixed some styling in GlEmptyState to be Pajamas compliant. Part of this change was defaulting the SVG height to 144 because that is the size illustrations are designed around (see https://design.gitlab.com/product-foundations/illustration#focal-point-grid). So we don't unintentionally affect any existing empty states we are setting :svg-height="null" to default back to the previous behavior.

Screenshots

Desktop

Before	After

Mobile

Before	After

How to test locally

1. Checkout this branch (see instructions in Code dropdown)
2. Go to any empty state. http://127.0.0.1:3000/admin/deploy_keys is an easy one to get to but there are lots of others

Release Notes

gitlab-org/gitlab-ui

v66.7.0

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Bug Fixes

• GlEmptyState: update styling to be Pajamas compliant (35862a2)

Features

• CSS: add gl-md-grid-template-columns-4 CSS utility class (2e7fe9b)

v66.6.0

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Features

• mixin: Add hover for gl-border-gray-10 mixin (ffe4522)

v66.5.0

Compare Source

Features

• GlSingleStat: Format the displayed number based on locale (b6a845d)

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