docs: fix broken links to csrf and e-mail verification docs (#10140)

### What?

This fixes a couple of broken links, specifically to the CSRF and the
e-mail verification doc pages, which appear to have been moved from the
root Authentication page.

### Why?

While it makes sense to familiarize one self with the Authentication
Overview page as well, if you are specifically looking for info on CSRF
protection (which I was doing while evaluting Payload for my agency),
the link should go to the right place.

docs/configuration/overview.mdx

@@ -79,7 +79,7 @@ The following options are available:
 | **`loggingLevels`**        | An object to override the level to use in the logger for Payload's errors.                                                                                                                     |
 | **`graphQL`**              | Manage GraphQL-specific functionality, including custom queries and mutations, query complexity limits, etc. [More details](../graphql/overview#graphql-options).                              |
 | **`cookiePrefix`**         | A string that will be prefixed to all cookies that Payload sets.                                                                                                                               |
-| **`csrf`**                 | A whitelist array of URLs to allow Payload to accept cookies from. [More details](../authentication/overview#csrf-protection).                                                                 |
+| **`csrf`**                 | A whitelist array of URLs to allow Payload to accept cookies from. [More details](../authentication/cookies#csrf-attacks).                                                                 |
 | **`defaultDepth`**         | If a user does not specify `depth` while requesting a resource, this depth will be used. [More details](../queries/depth).                                                                     |
 | **`defaultMaxTextLength`** | The maximum allowed string length to be permitted application-wide. Helps to prevent malicious public document creation.                                                                       |
 | **`maxDepth`**             | The maximum allowed depth to be permitted application-wide. This setting helps prevent against malicious queries. Defaults to `10`. [More details](../queries/depth).                          |

docs/production/preventing-abuse.mdx

@@ -20,7 +20,7 @@ Querying a collection and automatically including related documents via `depth`
 
 ## Cross-Site Request Forgery (CSRF)
 
-CSRF prevention will verify the authenticity of each request to your API to prevent a malicious action from another site from authorized users. See how to configure CSRF [here](/docs/authentication/overview#csrf-protection).
+CSRF prevention will verify the authenticity of each request to your API to prevent a malicious action from another site from authorized users. See how to configure CSRF [here](/docs/authentication/cookies#csrf-attacks).
 
 ## Cross Origin Resource Sharing (CORS)
 
@@ -38,7 +38,7 @@ If you do not need GraphQL it is advised that you disable it altogether with the
 
 Payload does not execute uploaded files on the server, but depending on your setup it may be used to transmit and store potentially dangerous files. If your configuration allows file uploads there is the potential that a bad actor uploads a malicious file that is then served to other users. Consider the following ways to mitigate the risks.
 
-First, enable email [verification](/docs/authentication/overview#email-verification) when users are allowed to register new accounts and add other bot prevention services.
+First, enable email [verification](/docs/authentication/email#email-verification) when users are allowed to register new accounts and add other bot prevention services.
 
 Review that `create` and `update` access on file upload collections are as restrictive as your application needs allow. Consider limiting `read` access of uploaded user's files and how you might limit user uploaded files from being served outside of Payload.