Update docker.elastic.co/kibana/kibana Docker tag to v8.15.2 (master)

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
docker.elastic.co/kibana/kibana (source)	patch	8.15.1 -> 8.15.2

---

Release Notes

elastic/kibana (docker.elastic.co/kibana/kibana)

### [`v8.15.2`](https://redirect.github.com/elastic/kibana/releases/tag/v8.15.2): Kibana 8.15.2 [Compare Source](https://redirect.github.com/elastic/kibana/compare/v8.15.1...v8.15.2) Downloads: https://elastic.co/downloads/kibana Release notes: https://www.elastic.co/guide/en/kibana/8.15/release-notes-8.15.2.html

---

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 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 was generated by Mend Renovate. View the repository job log.