Merge branch 'renovate/loki-2.x' into 'master'

Update Helm release loki to v2.7.0

See merge request openappstack/openappstack!572

flux2/apps/monitoring/loki-release.yaml

@@ -11,7 +11,7 @@ spec:
       # https://artifacthub.io/packages/helm/grafana/loki
       # renovate: registryUrl=https://grafana.github.io/helm-charts
       chart: loki
-      version: 2.6.0
+      version: 2.7.0
       sourceRef:
         kind: HelmRepository
         name: grafana