docs: fix oidc config examples

[znerol]

Related issue

None

Proposed changes

It looks like some of the docs for the oidc login method still reflect url patterns and yaml structure used before 8985189 and 9369d1b

Update those docs to match the code.

Checklist

• I have read the contributing guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security. vulnerability, I
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  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further comments

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[aeneasr]

Nice catch, thank you!