Update registry1.dso.mil/ironbank/google/golang/ubi9/golang-1.21 Docker tag to v1.21.9

This MR contains the following updates:

Package	Type	Update	Change
registry1.dso.mil/ironbank/google/golang/ubi9/golang-1.21	ironbank-base	patch	1.21.8 -> 1.21.9
registry1.dso.mil/ironbank/google/golang/ubi9/golang-1.21	final	patch	1.21.8 -> 1.21.9

---

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 these updates again.

---

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

---

This MR has been generated by Renovate Bot.