docs: Using Dex with OIDC needs the `config` element in yaml (#8510)
docs: Using Dex with OIDC needs the `config` element in yaml (#8510)

In order to get Dex working with an OIDC provider, I had to structure the Dex config according to the [Dex Documentation](https://dexidp.io/docs/connectors/oidc/#configuration).
This means placing the OIDC configuration within their own `config` element in the `dex.config`, rather than listing them on the same level as the generic connector settings.
argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd