Update GitLab UI/SVG

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/svgs (source)	dependencies	minor	1.155.0 -> 1.156.0
@gitlab/ui (source)	dependencies	minor	17.37.0 -> 17.39.0

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

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Release Notes

gitlab-org/gitlab-svgs

v1.156.0

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[1.156.0]

• Updated icon 'first-contribution'

gitlab-org/gitlab-ui

v17.39.0

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Features

• Add responsive align-items: center utility classes (68c141f)

v17.38.0

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Features

• GlFormInput: Add size prop (3221d01)

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