[stable/kubernetes-dashboard] Use the target port number instead of a name (#7548)

* [stable/kubernetes-dashboard] Use the target port number instead of a name

Older (but still actual) versions of some Network Policy providers don't support named ports as
a value of `targetPort` field in the Service spec.
Changing it to the number shouldn't break the UX for existing installations.

Signed-off-by: Mikhail Zholobov <legal90@gmail.com>

* [stable/kubernetes-dashboard] Bump chart version to 0.7.4

Signed-off-by: Mikhail Zholobov <legal90@gmail.com>

stable/kubernetes-dashboard/Chart.yaml

@@ -1,5 +1,5 @@
 name: kubernetes-dashboard
-version: 0.7.3
+version: 0.7.4
 appVersion: 1.10.0
 description: General-purpose web UI for Kubernetes clusters
 keywords:

stable/kubernetes-dashboard/templates/svc.yaml

@@ -19,7 +19,7 @@ spec:
   type: {{ .Values.service.type }}
   ports:
   - port: {{ .Values.service.externalPort }}
-    targetPort: https
+    targetPort: 8443
 {{- if hasKey .Values.service "nodePort" }}
     nodePort: {{ .Values.service.nodePort }}
 {{- end }}