chore(deps): update helm release loki to v3.8.1

This MR contains the following updates:

Package	Update	Change
loki (source)	minor	3.6.1 -> 3.8.1

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Release Notes

grafana/helm-charts

v3.8.1

Helm chart for Grafana Loki in simple, scalable mode

Source commit: https://github.com/grafana/loki/commit/fde44609c05d11d458a7fa819457099bac695527

Tag on source: https://github.com/grafana/loki/releases/tag/helm-loki-3.8.1

v3.8.0

Helm chart for Grafana Loki in simple, scalable mode

Source commit: https://github.com/grafana/loki/commit/05d21106817438f523c6161d0a1312812d6db44c

Tag on source: https://github.com/grafana/loki/releases/tag/helm-loki-3.8.0

v3.7.0

Helm chart for Grafana Loki in simple, scalable mode

Source commit: https://github.com/grafana/loki/commit/79e0d96978fcfa218a37b3731d5135599962ff6b

Tag on source: https://github.com/grafana/loki/releases/tag/helm-loki-3.7.0

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