Update php Docker tag to v8.0.12

This MR contains the following updates:

Package	Type	Update	Change
php	final	patch	8.0.11-apache-bullseye -> 8.0.12-apache-bullseye

---

Configuration

📅 Schedule: 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, click this checkbox.

---

This MR has been generated by Renovate Bot.