add link for an article about rendering ,by kentcdodds.com (#7208)

* add link for an article about rendering ,by kentcdodds.com

* Update src/data/roadmaps/react/content/rendering@0uiGsC5SWavNdlFqizkKe.md

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Co-authored-by: dsh <daniel.s.holdsworth@gmail.com>

src/data/roadmaps/react/content/rendering@0uiGsC5SWavNdlFqizkKe.md

@@ -15,3 +15,4 @@ Visit the following resources to learn more:
 
 - [@official@Render and Commit - Official Docs](https://react.dev/learn/render-and-commit)
 - [@article@Rendering in React - ui.dev](https://ui.dev/why-react-renders)
+- [@article@Fix the slow render before you fix the re-render](https://kentcdodds.com/blog/fix-the-slow-render-before-you-fix-the-re-render)