Update ghost to use v0.9.0 osba firewall rules and service (#118)

ghost/Chart.yaml

@@ -1,5 +1,5 @@
 name: ghost
-version: 0.3.0
+version: 0.4.0
 appVersion: 1.17.3
 description: A simple, powerful publishing platform that allows you to share your stories with the world
 keywords:

ghost/templates/mysql-instance.yaml

@@ -9,12 +9,14 @@ metadata:
     release: "{{ .Release.Name }}"
     heritage: "{{ .Release.Service }}"
 spec:
-  clusterServiceClassExternalName: azure-mysqldb
+  clusterServiceClassExternalName: azure-mysql
   clusterServicePlanExternalName: {{ .Values.mysql.azure.servicePlan }}
   parameters:
     location: {{ .Values.mysql.azure.location }}
     resourceGroup: {{ .Release.Namespace }}
     sslEnforcement: disabled
-    firewallStartIPAddress: 0.0.0.0
-    firewallEndIPAddress: 255.255.255.255
+    firewallRules:
+    - startIPAddress: "0.0.0.0"
+      endIPAddress: "255.255.255.255"
+      name: "AllowAll"
 {{- end }}