Update dependency org.postgresql:postgresql to v42.5.3 (mulk/mulkcms2!15)

This MR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [org.postgresql:postgresql](https://jdbc.postgresql.org) ([source](https://github.com/pgjdbc/pgjdbc)) | build | patch | `42.5.2` -> `42.5.3` |

---

### 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.

â™» **Rebasing**: Whenever MR is behind base branch, or you tick the rebase/retry checkbox.

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

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this MR, check this box

---

This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNC4yNC4wIiwidXBkYXRlZEluVmVyIjoiMzQuMjQuMCJ9-->