Update README.md

Author: TheCodingSheikh

charts/kubeflow/README.md

@@ -386,4 +386,8 @@ resources:
 
               redirect_url = "/oauth2/callback"
               relative_redirect_url = true
-```
+```
+
+### Goals
+
+- update cert-manager, istio-base, istiod, dex, oauth2-proxy to use their upstream official helm charts instead of manifets repo, with default values that match the kustomize patches in the manifets repo