fix: remove string comparison for boolean (#248)

charts/chronograf/Chart.yaml

 apiVersion: v1
 name: chronograf
-version: 1.1.22
+version: 1.1.23
 appVersion: 1.8.9.1
 description: Open-source web application written in Go and React.js that provides
   the tools to visualize your monitoring data and easily create alerting and automation

charts/chronograf/templates/pvc.yaml

@@ -9,7 +9,7 @@ metadata:
     release: "{{ .Release.Name }}"
     heritage: "{{ .Release.Service }}"
   annotations:
- {{- if (eq "true" .Values.persistence.keepPvc) }}
+ {{- if .Values.persistence.keepPvc }}
     "helm.sh/resource-policy": keep
  {{- end }}
 spec: