chore(deps): update helm release victoria-metrics-single to v0.12.6

[p6r-renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
victoria-metrics-single	HelmChart	patch	0.12.4 -> 0.12.6

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Release Notes

VictoriaMetrics/helm-charts (victoria-metrics-single)

### [`v0.12.6`](https://redirect.github.com/VictoriaMetrics/helm-charts/releases/tag/victoria-metrics-single-0.12.6) [Compare Source](https://redirect.github.com/VictoriaMetrics/helm-charts/compare/victoria-metrics-single-0.12.5...victoria-metrics-single-0.12.6) ### Release notes for version 0.12.6 **Release date:** 2024-11-07   - set default DNS domain to `cluster.local.` - updated common dependency 0.0.19 -> 0.0.20 - fixed ability to pass a custom scrape and relabel configs. see [this issue](https://redirect.github.com/VictoriaMetrics/helm-charts/issues/1700). ### [`v0.12.5`](https://redirect.github.com/VictoriaMetrics/helm-charts/releases/tag/victoria-metrics-single-0.12.5) [Compare Source](https://redirect.github.com/VictoriaMetrics/helm-charts/compare/victoria-metrics-single-0.12.4...victoria-metrics-single-0.12.5) ### Release notes for version 0.12.5 **Release date:** 2024-11-06   - Fix Deployment/StatefulSets when `serviceAccount.name` is empty and `serviceAccount.create: false`. See [this issue](https://redirect.github.com/VictoriaMetrics/helm-charts/issues/1683).

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