fix: update broken custom components docs link in config types jsdoc (#15794)

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### What?

### Why?

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Fixes #

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### What?

Fix a broken documentation link in the `Config` type JSDoc for admin
custom components.

- Updated:
  - `https://payloadcms.com/docs/admin/custom-components/overview`
- To:
  - `https://payloadcms.com/docs/custom-components/overview`

### Why?

The previous URL was broken/outdated, so developers reading type
definitions were sent to an invalid docs path.

### How?

Changed the `@see` link in:

- `packages/payload/src/config/types.ts`

No runtime behavior or API logic changed; this is a docs-link correction
only.

Author: divyamdotfoo

packages/payload/src/config/types.ts

@@ -854,7 +854,7 @@ export type Config = {
     /**
      * Add extra and/or replace built-in components with custom components
      *
-     * @see https://payloadcms.com/docs/admin/custom-components/overview
+     * @see https://payloadcms.com/docs/custom-components/overview
      */
     components?: {
       /**