Documentation fix

[Pradyumn-cloud]

Fix - #3244

Changes done as Mentioned in issue.

insecureSkipVerify set to true

added jwksUri: http://dex.auth.svc.cluster.local:5556/dex/keys

✅ Contributor Checklist

• I have tested these changes with kustomize. See Installation Prerequisites.
• All commits are signed-off to satisfy the DCO check.

[google-oss-prow]

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[juliusvonkohout]

You need to sign you commits as desribed in https://github.com/kubeflow/manifests/pull/3257/checks?check_run_id=52443746965

[juliusvonkohout]

1. the default should be false
2. Please link in an inline comment about self-signed certificates to the dex documentation where this is documented

[juliusvonkohout]

Please revert this. It should be a comment for the variable in line 156 DEX_ISSUER="https://kubeflow.example.com/dex". Please also link to the dex documentation or something that explains the change.