Update dependency @gitlab/ui to v27.4.6

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/ui (source)	dependencies	patch	27.4.3 -> 27.4.6

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

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Release Notes

gitlab-org/gitlab-ui

v27.4.6

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Bug Fixes

• GlPopover: Pass through popover manual events (3bd7635)

v27.4.5

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Bug Fixes

• GlChart: Upgrade to echarts 4.9.0 (1a832ed)

v27.4.4

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Bug Fixes

• GlSearchBoxByType: fix overlapping clear button and loading icon (b72c70e)

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