helm: gateway: also listen on IPv6 (#9510)

**What this PR does / why we need it**:

Currently the gateway only listens on IPv4. On IPv6-only clusters, this
causes the readiness probe to fail, rendering the gateway unusable.

**Which issue(s) this PR fixes**:
No issue created

**Special notes for your reviewer**:

**Checklist**
- [x] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [ ] Documentation added
- [ ] Tests updated
- [x] `CHANGELOG.md` updated
- [x] N/A Changes that require user attention or interaction to upgrade
are documented in `docs/sources/upgrading/_index.md`

Signed-off-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>

production/helm/loki/CHANGELOG.md

@@ -13,6 +13,10 @@ Entries should include a reference to the pull request that introduced the chang
 
 [//]: # (<AUTOMATED_UPDATES_LOCATOR> : do not remove this line. This locator is used by the CI pipeline to automatically create a changelog entry for each new Loki release. Add other chart versions and respective changelog entries bellow this line.)
 
+## 5.5.10
+
+- [CHANGE] Make the gateway listen on IPv6 as well as IPv4
+
 ## 5.5.9
 
 - [FEATURE] Add `loki.configStorageType` & `loki.externalConfigSecretName` values to chart and templates.

production/helm/loki/Chart.yaml

@@ -3,7 +3,7 @@ name: loki
 description: Helm chart for Grafana Loki in simple, scalable mode
 type: application
 appVersion: 2.8.2
-version: 5.5.9
+version: 5.5.10
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 5.5.9](https://img.shields.io/badge/Version-5.5.9-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.2](https://img.shields.io/badge/AppVersion-2.8.2-informational?style=flat-square)
+![Version: 5.5.10](https://img.shields.io/badge/Version-5.5.10-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.2](https://img.shields.io/badge/AppVersion-2.8.2-informational?style=flat-square)
 
 Helm chart for Grafana Loki in simple, scalable mode
 

production/helm/loki/templates/_helpers.tpl

@@ -600,6 +600,7 @@ http {
 
   server {
     listen             8080;
+    listen             [::]:8080;
 
     {{- if .Values.gateway.basicAuth.enabled }}
     auth_basic           "Loki";
@@ -793,4 +794,4 @@ enableServiceLinks: false
 {{- $schedulerAddress = printf "query-scheduler-discovery.%s.svc.%s.:9095" .Release.Namespace .Values.global.clusterDomain -}}
 {{- end -}}
 {{- printf "%s" $schedulerAddress }}
-{{- end }}
+{{- end }}