docs update: keycloak.md shows an old keycloak version and should be updated

[mmueller-rs]

Summary

The operator-manual to configure SSO with Keycloak seems to use a Keycloak version of ~13. By now, Keycloak version 20 is out and the UI has changed significantly.

Motivation

If one wants to configure ArgoCD to use Keycloak for SSO, one wants to use this documentation to configure the client.

Proposal

Go through the process and make new screenshots on how to configure the client properly.

Additional Info

There is already an updated version Draft in my fork: mmueller-a9s/argo-cd

[todaywasawesome]

@mmueller-a9s Do you want to go ahead and add a pull request?

Functionally, are there any differences in the instructions or is it the same between versions?

[mmueller-rs]

@todaywasawesome I've created a Pull Request: #12505
The functionality is the same between the versions. The only difference is that Keycloak removed the /auth from the path, but this has already been updated in e5e3b0f

I've configured a keycloak client in Keycloak v13 using the old documentation and updated Keycloak to v20. When I updated this documentation, I paid attention that the configuration is equal.
I also created a new keycloak client in Keycloak v20 using the new documentation and it worked.

[jbatmalle]

Hi @mmueller-a9s,
I tested with keycloack 21.1.1 (latest version) and they are the same screens as for version 20
It's works for me
Thanks to you 👍