Update dependency @gitlab/ui to v68.2.1

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/ui	dependencies	minor	68.1.0 -> 68.2.1

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

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Release Notes

gitlab-org/gitlab-ui

v68.2.1

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Bug Fixes

• GlPopover: increase hide delay (7fb02fa)

v68.2.0

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Bug Fixes

• css: remove vendor-prefixed property (de23bf4)
• GlBroadcastMessage: wrap long words (25ad510)

Features

• css: add gl-overflow-anywhere utility (3b26c8c)

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