chore(examples): Document example credentials for keycloak provider. (#11087)

* Document example credentials for keycloak provider.

* Update auth.ts

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Co-authored-by: Balázs Orbán <[email protected]>

Author: falcowinkler

apps/examples/nextjs/auth.ts

@@ -69,7 +69,7 @@ const config = {
     GitLab,
     Google,
     Hubspot,
-    Keycloak,
+    Keycloak({ name: "Keycloak (bob/bob)" }),
     LinkedIn,
     Netlify,
     Okta,