Update dependency @gitlab/ui to v78.2.2

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/ui	dependencies	minor	78.1.1 -> 78.2.2

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

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Release Notes

gitlab-org/gitlab-ui

v78.2.1

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Bug Fixes

• GlDuoChat: clear prompt after /clean (d3fcd9f)

v78.2.0

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Features

• css: Add easing variables (33a3973)

78.1.2 (2024-03-13)

Bug Fixes

• Repair right alignment for table header (3051537)

78.1.1 (2024-03-05)

Bug Fixes

• GlDuoChat: allow typing prompt while streaming (bc107bf)

v78.1.2

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Bug Fixes

• Repair right alignment for table header (3051537)

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