Update ghcr.io/unpoller/unpoller Docker tag to v2.19.0 (#2669)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/unpoller/unpoller](https://github.com/unpoller/unpoller) | minor | `v2.18.0` -> `v2.19.0` |

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### Release Notes

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

### [`v2.19.0`](https://github.com/unpoller/unpoller/releases/tag/v2.19.0)

[Compare Source](https://github.com/unpoller/unpoller/compare/v2.18.0...v2.19.0)

#### Changelog

- [`9ba7ddc`](9ba7ddcd11) Merge pull request [#&#8203;898](https://github.com/unpoller/unpoller/issues/898) from unpoller/issue-350-counters
- [`a00aeb2`](a00aeb2eb5) Add byte counters for InfluxDB and Prometheus outputs (issue [#&#8203;350](https://github.com/unpoller/unpoller/issues/350))

</details>

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### Configuration

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♻ **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.

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Reviewed-on: https://gitea.alexlebens.dev/alexlebens/infrastructure/pulls/2669
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
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clusters/cl01tl/helm/unpoller/values.yaml

@@ -9,7 +9,7 @@ unpoller:
         main:
           image:
             repository: ghcr.io/unpoller/unpoller
-            tag: v2.18.0
+            tag: v2.19.0
             pullPolicy: IfNotPresent
           env:
             - name: UP_UNIFI_CONTROLLER_0_SAVE_ALARMS