update deprecated deployment api version from extensions/v1beta1 to

charts/kapacitor/templates/deployment.yaml

 {{- $bl := empty .Values.influxURL }}
 {{- if not $bl }}
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: {{ template "kapacitor.fullname" . }}
@@ -11,6 +11,9 @@ metadata:
     app: {{ template "kapacitor.fullname" . }}
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      app: {{ template "kapacitor.fullname" . }}
   template:
     metadata:
       labels: