Merge branch 'release-1.3' into release-notes-1.3.1

Author: nickboldt

assemblies/assembly-admin-templates.adoc

@@ -22,5 +22,4 @@ include::modules/templates/proc-adding-templates.adoc[leveloffset=+1]
 
 [role="_additional-resources"]
 .Additional resources
-* link:{LinkGettingStartedGuide}[Configuring a GitHub App in {product-short}]
-* link:{LinkGettingStartedGuide}[Enabling the GitLab OAuth authentication provider]
+* link:{authentication-book-url}#assembly-auth-provider-github[Enabling the GitHub authentication provider]