Chore: Update libraries-addons.md with the updated material-ui link (#982)

Author: CoolGoose

content/en/about/libraries-addons.md

@@ -41,7 +41,7 @@ A collection of modules built to work wonderfully with Preact.
 
 ## GUI Toolkits
 
-- 🎴 [**@mui/material**](https://github.com/mui-org/material-ui/tree/master/examples/preact): the React UI library you always wanted. Follow your own design system, or start with Material Design.
+- 🎴 [**@mui/material**](https://github.com/mui/material-ui/tree/master/examples/material-preact): the React UI library you always wanted. Follow your own design system, or start with Material Design.
 - :thumbsup: [**preact-material-components**](https://github.com/prateekbh/preact-material-components): Material Components for the Web (supersedes MDL)
 - :white_square_button: [**preact-mdl**](https://github.com/developit/preact-mdl): Use [MDL](https://getmdl.io) as Preact components
 - :rocket: [**preact-photon**](https://github.com/developit/preact-photon): build beautiful desktop UI with [photon](http://photonkit.com)
@@ -59,4 +59,4 @@ A collection of modules built to work wonderfully with Preact.
 - :tophat: [**preact-classless-component**](https://github.com/ld0rman/preact-classless-component): create preact components without the class keyword
 - :hammer: [**preact-hyperscript**](https://github.com/queckezz/preact-hyperscript): Hyperscript-like syntax for creating elements
 - :white_check_mark: [**shallow-compare**](https://github.com/tkh44/shallow-compare): simplified `shouldComponentUpdate` helper.
-- :signal_strength: [**@deepsignal/preact**](https://github.com/EthanStandel/deepsignal/tree/main/packages/preact): Extension of `@preact/signals` for full state management
+- :signal_strength: [**@deepsignal/preact**](https://github.com/EthanStandel/deepsignal/tree/main/packages/preact): Extension of `@preact/signals` for full state management