Update ghcr.io/unpoller/unpoller Docker tag to v2.18.0 (#2368)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/unpoller/unpoller](https://github.com/unpoller/unpoller) | minor | `v2.16.0` -> `v2.18.0` |

---

### Release Notes

<details>
<summary>unpoller/unpoller (ghcr.io/unpoller/unpoller)</summary>

### [`v2.18.0`](https://github.com/unpoller/unpoller/releases/tag/v2.18.0)

[Compare Source](https://github.com/unpoller/unpoller/compare/v2.17.2...v2.18.0)

#### Changelog

- [`f86eb46`](f86eb46192) Merge pull request [#&#8203;896](https://github.com/unpoller/unpoller/issues/896) from unpoller/issue-841-fix-multi-wan-speedtests
- [`0ffe615`](0ffe6152ab) Fix multi-WAN speed test reporting (issue [#&#8203;841](https://github.com/unpoller/unpoller/issues/841))

### [`v2.17.2`](https://github.com/unpoller/unpoller/releases/tag/v2.17.2)

[Compare Source](https://github.com/unpoller/unpoller/compare/v2.17.1...v2.17.2)

#### Changelog

- [`9b5dbef`](9b5dbef869) Merge pull request [#&#8203;894](https://github.com/unpoller/unpoller/issues/894) from unpoller/enhance-ubb-support-409
- [`8000597`](8000597fce) Refactor Prometheus UBB label construction to use append
- [`c61d265`](c61d2651a2) Enhance InfluxDB and Datadog UBB outputs with comprehensive metrics
- [`ab2c677`](ab2c677f30) uses new unifi lib
- [`6a135c6`](6a135c60a7) Enhance UBB device support with comprehensive Prometheus metrics
- [`750f3f3`](750f3f38c2) Merge pull request [#&#8203;893](https://github.com/unpoller/unpoller/issues/893) from unpoller/fix-892-healthcheck-binding
- [`ae4cf46`](ae4cf462a0) Merge pull request [#&#8203;891](https://github.com/unpoller/unpoller/issues/891) from unpoller/unifi-bump-5-2-0
- [`f0ed295`](f0ed2954b8) bump unifi to v5.2.0

### [`v2.17.1`](https://github.com/unpoller/unpoller/releases/tag/v2.17.1)

[Compare Source](https://github.com/unpoller/unpoller/compare/v2.17.0...v2.17.1)

#### Changelog

- [`8323346`](832334655c) Fix health check port binding conflict (issue [#&#8203;892](https://github.com/unpoller/unpoller/issues/892))

### [`v2.17.0`](https://github.com/unpoller/unpoller/releases/tag/v2.17.0)

[Compare Source](https://github.com/unpoller/unpoller/compare/v2.16.0...v2.17.0)

#### Changelog

- [`4e6ebee`](4e6ebee524) Merge pull request [#&#8203;890](https://github.com/unpoller/unpoller/issues/890) from unpoller/docker-healthcheck
- [`b960695`](b960695f3b) Add Docker health check support

</details>

---

### 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 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

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi4zOS4xIiwidXBkYXRlZEluVmVyIjoiNDIuMzkuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiaW1hZ2UiXX0=-->

Reviewed-on: #2368
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/unpoller/values.yaml

@@ -9,7 +9,7 @@ unpoller:
         main:
           image:
             repository: ghcr.io/unpoller/unpoller
-            tag: v2.16.0
+            tag: v2.18.0
             pullPolicy: IfNotPresent
           env:
             - name: UP_UNIFI_CONTROLLER_0_SAVE_ALARMS