Fix unintended change (#71892)

Revert link to the correct one

Author: jkakavas

x-pack/docs/en/security/authentication/oidc-realm.asciidoc

@@ -16,4 +16,4 @@ should also configure another realm, such as the <<native-realm, native realm>>
 in your authentication chain.
 
 In order to simplify the process of configuring OpenID Connect authentication
-within the {stack}, see <<saml-guide-stack,Configuring SAML single-sign-on on the {stack}>>.
+within the {stack}, there is a step-by-step guide: <<oidc-guide>>.