chore: address docs feedback post merge (#4899)

Author: AtofStryker

content/guides/guides/cross-origin-testing.md

@@ -149,4 +149,5 @@ We've written several other guides specifically about handling this situation.
 - [Web Security: Common Workarounds](/guides/guides/web-security#Common-Workarounds)
 - [Recipes: Logging In - Single Sign On](/examples/examples/recipes#Logging-In)
 - [Guides: Amazon Cognito Authentication](/guides/end-to-end-testing/amazon-cognito-authentication)
+- [Guides: Auth0 Authentication](/guides/end-to-end-testing/auth0-authentication)
 - [Guides: Okta Authentication](/guides/end-to-end-testing/okta-authentication)

content/guides/guides/web-security.md

@@ -70,7 +70,8 @@ need to be aware of.
 
 Cypress changes its own host URL to match that of your applications. With the
 exception of `cy.origin`, Cypress requires that the URLs navigated to have the
-same superdomain for the entirety of a single test.
+[same superdomain](/guides/guides/cross-origin-testing#Parts-of-a-URL) for the
+entirety of a single test.
 
 If you attempt to visit two different superdomains, the `cy.origin` command must
 be used to wrap Cypress commands of the second visited domain. Otherwise,