Update registry1.dso.mil/ironbank/opensource/python/python39 Docker tag to v3.9.9

This MR contains the following updates:

Package	Type	Update	Change
registry1.dso.mil/ironbank/opensource/python/python39	ironbank-base	patch	v3.9.7 -> v3.9.9

---

Configuration

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

🚦 Automerge: Enabled.

♻ 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.