Update modules/authentication/proc-enabling-authentication-with-github.adoc

Author: themr0c

modules/authentication/proc-enabling-authentication-with-github.adoc

@@ -161,7 +161,10 @@ auth:
 
 [TIP]
 ====
-To enable GitHub integration with another authentication provider you have already configured, omit the `auth` and `signInPage` sections from this procedure:
+To enable GitHub integration with another authentication provider you have already configured:
+
+* Add the GitHub provider to the existing `auth` section.
+* Keep the `signInPage` section from your authentication provider.
 
 .`app-config-rhdh.yaml` fragment with mandatory fields to enable integration with GitHub and use a different authentication provider
 [source,yaml]