chore(deps): update dependency geerlingguy.postgresql to v4 (#89)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [geerlingguy.postgresql](https://github.com/geerlingguy/ansible-role-postgresql) | role | major | `3.5.2` -> `4.0.0` |

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### Release Notes

<details>
<summary>geerlingguy/ansible-role-postgresql (geerlingguy.postgresql)</summary>

### [`v4.0.0`](https://github.com/geerlingguy/ansible-role-postgresql/compare/3.5.2...4.0.0)

[Compare Source](https://github.com/geerlingguy/ansible-role-postgresql/compare/3.5.2...4.0.0)

</details>

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### Configuration

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🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

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

---

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

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Reviewed-on: #89
Co-authored-by: Renovate Bot <renovate@mgrote.net>
Co-committed-by: Renovate Bot <renovate@mgrote.net>

requirements.yaml

@@ -31,4 +31,4 @@ roles:
   - name: roles-ansible.gitea
     version: "v3.5.3"
   - name: geerlingguy.postgresql
-    version: "3.5.2"
+    version: "4.0.0"