Update grafana/loki Docker tag to v2.9.1

This MR contains the following updates:

Package	Type	Update	Change
grafana/loki	ironbank-docker	patch	2.9.0 -> 2.9.1
grafana/loki		patch	2.9.0 -> 2.9.1
grafana/loki	stage	patch	2.9.0 -> 2.9.1

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⚠ Dependency Lookup Warnings ⚠

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Release Notes

grafana/loki

v2.9.1

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All Changes

Loki

Security

• 10573 DylanGuedes: Bump Docker base images to Alpine version 3.18.3 to mitigate CVE-2022-48174

Fixes

• 10585 ashwanthgoli / chaudum: Fix bug in index object client that could result in not showing all ingested logs in query results.
• 10314 bboreham: Fix race conditions in indexshipper.

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