Update Helm release uptime-kuma to v2.19.4

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
uptime-kuma	patch	2.19.3 -> 2.19.4

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Release Notes

dirsigler/uptime-kuma-helm (uptime-kuma)

### [`v2.19.4`](https://redirect.github.com/dirsigler/uptime-kuma-helm/releases/tag/uptime-kuma-2.19.4) [Compare Source](https://redirect.github.com/dirsigler/uptime-kuma-helm/compare/uptime-kuma-2.19.3...uptime-kuma-2.19.4) A self-hosted Monitoring tool like "Uptime-Robot".

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Configuration

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