charts: pihole fix oauth2 secret values escaping
diff --git a/charts/pihole/values.yaml b/charts/pihole/values.yaml
index bea1a7e..070be1e 100644
--- a/charts/pihole/values.yaml
+++ b/charts/pihole/values.yaml
@@ -1,8 +1,6 @@
 pihole: {}
 oauth2:
-  clientId: {{ .client_id }}
-  clientSecret: {{ .client_secret }}
-  cookieSecret: ""
+  cookieSecret: "1234123443214321"
   secretName: oauth2-secret
   configName: oauth2-proxy
 domain: pihole.p.example.com