Docs IA 2.0: Create Forms guide (#79288)

Closes: https://linear.app/vercel/issue/DOC-4671/forms
No redirects needed yet as no pages were deleted.

Author: delbaoliveira

docs/01-app/01-getting-started/10-error-handling.mdx

@@ -16,7 +16,7 @@ Errors can be divided into two categories: [expected errors](#handling-expected-
 
 ## Handling expected errors
 
-Expected errors are those that can occur during the normal operation of the application, such as those from [server-side form validation](/docs/app/building-your-application/data-fetching/server-actions-and-mutations#server-side-form-validation) or failed requests. These errors should be handled explicitly and returned to the client.
+Expected errors are those that can occur during the normal operation of the application, such as those from [server-side form validation](/docs/app/guides/forms) or failed requests. These errors should be handled explicitly and returned to the client.
 
 ### Server Functions