Update dependency @gitlab/ui to v38.9.0

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/ui (source)	dependencies	minor	38.8.2 -> 38.9.0

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

---

Release Notes

gitlab-org/gitlab-ui

v38.9.0

Compare Source

Features

• add a character counter to gl-form-textarea (1d45d26)

38.8.2 (2022-04-08)

Bug Fixes

• Label: Move tooltip to anchor instead of span (67d0e79)

38.8.1 (2022-04-08)

Bug Fixes

• Force a new release for revert (c983975)

Reverts

• GlChartSeriesLabel: Add validation for type prop (f971aab), closes /gitlab.com/gitlab-org/gitlab/-/merge_requests/83745#note_905812358

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this MR and you won't be reminded about this update again.

---

• If you want to rebase/retry this MR, check this box.

---

This MR has been generated by Renovate Bot.