[Logs] Update block action description (cloudflare#22696)

Author: pedrosousa

src/content/docs/logs/reference/security-fields.mdx

@@ -16,7 +16,7 @@ The Security fields contain rules to block requests that contain specific types
 | -------------------------------------- | -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `unknown`                              | Unknown        | Take no other action.                                                                                                                                      |
 | `allow`                                | Allow          | Bypass all subsequent rules.                                                                                                                               |
-| `block`                                | Drop           | Block with an HTTP 403 response.                                                                                                                           |
+| `block`                                | Drop           | Block with an HTTP status code of 403, 429, or any other 4XX status code.                                                                                  |
 | `challenge`                            | Challenge Drop | Issue an interactive challenge.                                                                                                                            |
 | `jschallenge`                          | Challenge Drop | Issue a JS challenge.                                                                                                                                      |
 | `log`                                  | Log            | Take no action other than logging the event.                                                                                                               |