Update Helm chart promtail to 6.16.3

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
promtail (source)	patch	6.16.2 -> 6.16.3

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[!WARNING] Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

grafana/helm-charts (promtail)

### [`v6.16.3`](https://togithub.com/grafana/helm-charts/releases/tag/grafana-6.16.3) [Compare Source](https://togithub.com/grafana/helm-charts/compare/promtail-6.16.2...promtail-6.16.3) The leading tool for querying and visualizing time series and metrics.

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[bloopy-boi[bot]]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ COPYPASTE	jscpd	yes		no	1.01s
✅ YAML	prettier	1	0	0	0.47s
✅ YAML	yamllint	1		0	0.23s

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