Update dependency gitlab-dangerfiles to '~> 4.9.0'

This MR contains the following updates:

Package	Update	Change	MyDiffEnd
gitlab-dangerfiles (changelog)	minor	'~> 4.8.0' -> '~> 4.9.0'	https://my.diffend.io/gems/gitlab-dangerfiles/4.8.1/4.9.1

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

---

Release Notes

gitlab-org/ruby/gems/gitlab-dangerfiles (gitlab-dangerfiles)

v4.9.1

Compare Source

4.9.1 (2025-05-04)

Fixed (1 change)

• Fix Import and Integrate reviewer matches (merge request)

v4.9.0

Compare Source

4.9.0 (2025-04-28)

Other (1 change)

• Remove subject_above_warning problem type (merge request)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - 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.