chore(deps): update helm release grafana to v6.60.4

Author: renovate[bot]

apps/grafana/base/kustomization.yaml

@@ -5,7 +5,7 @@ helmCharts:
   - name: grafana
     includeCRDs: true
     releaseName: grafana
-    version: 6.57.2
+    version: 6.60.4
     repo: https://grafana.github.io/helm-charts
     valuesInline:
       fullnameOverride: grafana