use fullname instead of .Release.Name for AllowedHosts name

allowed-hosts/templates/constraint.yaml

 apiVersion: constraints.gatekeeper.sh/v1beta1
 kind: AllowedHosts
 metadata:
-  name: {{ .Release.Name }}
+  name: {{ include "allowed-hosts.fullname" . }}
   labels:
     {{- include "allowed-hosts.labels" . | nindent 4 }}
 spec:

allowed-hosts/values.yaml

+nameOverride: ''
+fullnameOverride: ''
+
 allowedDomains: []
 # - "*.example.com"
 # - "example.com"