Update grafana/loki Docker tag to v2.9.11

[renovate]

This PR contains the following updates:

Package	Update	Change
grafana/loki	patch	2.9.6 -> 2.9.11

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Release Notes

grafana/loki (grafana/loki)

v2.9.11

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Bug Fixes

• switch promtails base image from debian to ubuntu (backport release-2.9.x) (#​15210) (ae1fb5a)

v2.9.10

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Bug Fixes

• Update dependencies versions to remove CVE (#​13835) (567bef2)

v2.9.9

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All Changes

Loki

Fixes

• 12925 grobinson-grafana Ingester: Add ingester_chunks_flush_failures_total
• 13140 grobinson-grafana Ingester: Add backoff to flush op

v2.9.8

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All Changes

Loki

Fixes

• update module golang.org/x/net to v0.23.0 [security] (release-2.9.x) (#​12865) (94e0029)

v2.9.7

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Bug Fixes

• Bump go to 1.21.9 and build image to 0.33.1 (#​12542) (efc4d2f)

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