feat(helm): update loki ( 6.15.0 → 6.16.0 ) (#3564)

Co-authored-by: mahoro-bot[bot] <115426318+mahoro-bot[bot]@users.noreply.github.com>

Author: mahoro-bot[bot]

kubernetes/main/apps/observability/loki/app/helmrelease.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: loki
-      version: 6.15.0
+      version: 6.16.0
       sourceRef:
         kind: HelmRepository
         name: grafana