Update README.md

fix link to featured notebook

README.md

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 A tiny package to make `html"<input>"` a bit more Julian. Use it with the [`@bind`](https://juliapluto.github.io/sample-notebook-previews/Interactivity.html) macro in [Pluto](https://github.com/fonsp/Pluto.jl).
 
-For **documentation**, read the [**PlutoUI.jl sample notebook** inside Pluto](https://juliapluto.github.io/sample-notebook-previews/PlutoUI.jl.html), or [read the docstrings](https://juliahub.com/docs/PlutoUI/).
+For **documentation**, read the [**PlutoUI.jl sample notebook** inside Pluto](https://featured.plutojl.org/basic/plutoui.jl), or [read the docstrings](https://juliahub.com/docs/PlutoUI/).
 
 > If you know a bit of JavaScript, this package is a great, low-entry way to contribute to Pluto! All fun UI elements are welcome here!