Update dependency @gitlab/duo-ui to ^12.4.3

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/duo-ui	dependencies	minor	^12.2.0 -> ^12.4.3

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

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Release Notes

gitlab-org/duo-ui (@​gitlab/duo-ui)

v12.4.3

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Bug Fixes

• DuoChat: Fix renderGFM call in messages (7c6e84d)

v12.4.2

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Bug Fixes

• DuoChat: Hide new chat button (cf49260)

v12.4.1

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Bug Fixes

• Fix code block overflow (d866ff2)

v12.4.0

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Features

• AgenticDuoChat: add model selection slot (8491438)

12.3.3 (2025-10-17)

Bug Fixes

• DuoChat: Fix minor padding issue (08fa46e)

12.3.2 (2025-10-16)

Bug Fixes

• chat: Added new prop (24423c4)
• DuoChat: Updated prop naming (151101a)

12.3.1 (2025-10-16)

Bug Fixes

• DuoChat: Fix user message being left aligned (77d78c3)

v12.3.3

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Bug Fixes

• DuoChat: Fix minor padding issue (08fa46e)

v12.3.2

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Bug Fixes

• chat: Added new prop (24423c4)
• DuoChat: Updated prop naming (151101a)

v12.3.1

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Bug Fixes

• DuoChat: Fix user message being left aligned (77d78c3)

v12.3.0

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Features

• WebAgenticDuoChat: make autofocus controlled prop (fc79b85)

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