[stable/oauth2-proxy] Avoid Ingress.metadata.annotations with a null value (#17618)

Signed-off-by: ayoub mrini <amrini@wiremind.fr>

stable/oauth2-proxy/Chart.yaml

@@ -1,5 +1,5 @@
 name: oauth2-proxy
-version: 1.0.0
+version: 1.0.1
 apiVersion: v1
 appVersion: 4.0.0
 home: http://www.videntity.com/

stable/oauth2-proxy/templates/ingress.yaml

@@ -11,10 +11,10 @@ metadata:
     heritage: {{ .Release.Service }}
     release: {{ .Release.Name }}
   name: {{ template "oauth2-proxy.fullname" . }}
+{{- with .Values.ingress.annotations }}
   annotations:
-    {{- range $key, $value := .Values.ingress.annotations }}
-      {{ $key }}: {{ $value | quote }}
-    {{- end }}
+{{ toYaml . | indent 4 }}
+{{- end }}
 spec:
   rules:
     {{- range $host := .Values.ingress.hosts }}