docs: update link to Custom Components Performance docs (#15723)

This PR fixes a broken or outdated documentation link within the
Performance Overview page. The link pointing to the performance section
of custom components was using an incorrect path and has been updated to
the current structure.

Author: blankse

docs/performance/overview.mdx

@@ -52,7 +52,7 @@ To learn more, see the [Validation Performance](../fields/overview#validation-pe
 
 When building custom components in the Admin Panel, ensure that they are as efficient as possible. This includes using React best practices such as memoization, lazy loading, and avoiding unnecessary re-renders.
 
-To learn more, see the [Custom Components Performance](../admin/custom-components#performance) docs.
+To learn more, see the [Custom Components Performance](../custom-components/overview#performance) docs.
 
 ## Other Best Practices