Release mimir-distributed Helm chart 6.1.0-weekly.391 (#15067)

Automated PR created by
[helm-weekly-release-pr.yaml](https://github.com/grafana/mimir/blob/main/.github/workflows/helm-weekly-release-pr.yaml)

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk: this PR only updates Helm chart metadata/version strings and
README badges, with no template or value changes.
> 
> **Overview**
> Updates the `mimir-distributed` Helm chart release metadata to
`6.1.0-weekly.391` and sets `appVersion` to `r391-a80aeea6`.
> 
> Refreshes `README.md` to reflect the new chart/app versions (note text
and version badges).
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
91ad8ce. Bugbot is set up for automated
code reviews on this repo. Configure
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Co-authored-by: krajorama <13435893+krajorama@users.noreply.github.com>

Author: mimir-vendoring[bot]

operations/helm/charts/mimir-distributed/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
-version: 6.1.0-weekly.388
-appVersion: r388-7ddd6cc7
+version: 6.1.0-weekly.391
+appVersion: r391-a80aeea6
 description: "Grafana Mimir"
 home: https://grafana.com/docs/helm-charts/mimir-distributed/latest/
 icon: https://grafana.com/static/img/logos/logo-mimir.svg

operations/helm/charts/mimir-distributed/README.md

@@ -4,7 +4,7 @@ Helm chart for deploying [Grafana Mimir](https://grafana.com/docs/mimir/latest/)
 
 For the full documentation, visit [Grafana mimir-distributed Helm chart documentation](https://grafana.com/docs/helm-charts/mimir-distributed/latest/).
 
-> **Note:** The documentation version is derived from the Helm chart version which is 6.1.0-weekly.388.
+> **Note:** The documentation version is derived from the Helm chart version which is 6.1.0-weekly.391.
 
 When upgrading from Helm chart version 4.X, please see [Migrate the Helm chart from version 4.x to 5.0](https://grafana.com/docs/helm-charts/mimir-distributed/latest/migration-guides/migrate-helm-chart-4.x-to-5.0/).
 When upgrading from Helm chart version 3.x, please see [Migrate from single zone to zone-aware replication with Helm](https://grafana.com/docs/helm-charts/mimir-distributed/latest/migration-guides/migrate-from-single-zone-with-helm/).
@@ -14,7 +14,7 @@ When upgrading from Helm chart version 2.1, please see [Upgrade the Grafana Mimi
 
 # mimir-distributed
 
-![Version: 6.1.0-weekly.388](https://img.shields.io/badge/Version-6.1.0--weekly.388-informational?style=flat-square) ![AppVersion: r388-7ddd6cc7](https://img.shields.io/badge/AppVersion-r388--7ddd6cc7-informational?style=flat-square)
+![Version: 6.1.0-weekly.391](https://img.shields.io/badge/Version-6.1.0--weekly.391-informational?style=flat-square) ![AppVersion: r391-a80aeea6](https://img.shields.io/badge/AppVersion-r391--a80aeea6-informational?style=flat-square)
 
 Grafana Mimir