build: update postgres docker tag to v14.5

This MR contains the following updates:

Package	Type	Update	Change
postgres	service-image	minor	14.4-alpine -> 14.5-alpine
postgres		minor	14.4-alpine -> 14.5-alpine

---

Configuration

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

---

• If you want to rebase/retry this MR, click this checkbox.

---

This MR has been generated by Renovate Bot.