Update 02.md (epicweb-dev#132)

added learn more about lazy state initialization blog link
louisxsheid · Apr 12, 2021 · 1aa13c3 · 1aa13c3
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@@ -56,6 +56,8 @@ needed!
 Make the `React.useState` call use lazy initialization to avoid a performance
 bottleneck of reading into localStorage on every render.
 
+> Learn more about [lazy state initialization](https://kentcdodds.com/blog/use-state-lazy-initialization-and-function-updates)
+
 ### 2. 💯 effect dependencies
 
 [Production deploy](https://react-hooks.netlify.app/isolated/final/02.extra-2.js)