Update dependency software.amazon.awssdk:bom to v2.18.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
software.amazon.awssdk:bom (source)	2.18.8 -> 2.18.9

---

⚠ Dependency Lookup Warnings ⚠

Warnings were logged while processing this repo. Please check the Dependency Dashboard for more information.

---

Release Notes

aws/aws-sdk-java-v2

### [`v2.18.9`](https://togithub.com/aws/aws-sdk-java-v2/compare/2.18.8...2.18.9) [Compare Source](https://togithub.com/aws/aws-sdk-java-v2/compare/2.18.8...2.18.9)

---

Configuration

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

🚦 Automerge: Enabled.

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

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

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.