chore(deps): update helm release promtail to v6.16.6

[sbaizet-ledger]

This PR contains the following updates:

Package	Update	Change
promtail (source)	patch	6.16.5 -> 6.16.6

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Release Notes

grafana/helm-charts (promtail)

### [`v6.16.6`](https://redirect.github.com/grafana/helm-charts/releases/tag/promtail-6.16.6) [Compare Source](https://redirect.github.com/grafana/helm-charts/compare/promtail-6.16.5...promtail-6.16.6) Promtail is an agent which ships the contents of local logs to a Loki instance #### What's Changed - \[promtail] allow to inject templates by [@​Wielewout](https://redirect.github.com/Wielewout) in [https://github.com/grafana/helm-charts/pull/3248](https://redirect.github.com/grafana/helm-charts/pull/3248) #### New Contributors - [@​Wielewout](https://redirect.github.com/Wielewout) made their first contribution in [https://github.com/grafana/helm-charts/pull/3248](https://redirect.github.com/grafana/helm-charts/pull/3248) **Full Changelog**: https://github.com/grafana/helm-charts/compare/grafana-agent-operator-0.4.2...promtail-6.16.6

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