docs: broken anchor link in blocks field table (#15887)

## What
Fixed a broken anchor link in the Blocks Field documentation table.

## Why
The `blocks` property in the Block Config Options table was linking to
`#block-configs`, which doesn't exist as a heading in the document.

## How
Updated the anchor from `#block-configs` to `#config-options` to
correctly link to the "Config Options" section under "Blocks Items".

Fixes #15877

Author: PatrikKozak

docs/fields/blocks.mdx

@@ -46,7 +46,7 @@ This page is divided into two parts: first, the settings of the Blocks Field, an
 | ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | **`name`** \*          | To be used as the property name when stored and retrieved from the database. [More details](/docs/fields/overview#field-names).                                                                                                                                                                         |
 | **`label`**            | Text used as the heading in the Admin Panel or an object with keys for each language. Auto-generated from name if not defined.                                                                                                                                                                          |
-| **`blocks`** \*        | Array of [block configs](/docs/fields/blocks#block-configs) to be made available to this field.                                                                                                                                                                                                         |
+| **`blocks`** \*        | Array of [block configs](/docs/fields/blocks#config-options) to be made available to this field.                                                                                                                                                                                                        |
 | **`validate`**         | Provide a custom validation function that will be executed on both the Admin Panel and the backend. [More details](/docs/fields/overview#validation).                                                                                                                                                   |
 | **`minRows`**          | A number for the fewest allowed items during validation when a value is present.                                                                                                                                                                                                                        |
 | **`maxRows`**          | A number for the most allowed items during validation when a value is present.                                                                                                                                                                                                                          |