Add Andreas Kuster's published webpage (alshedivat#991)

Thanks a lot for this very neat and professional template. This PR adds
my academic page to the Academics list

Author: andreaskuster

README.md

@@ -84,6 +84,7 @@ Feel free to add your own page(s) by sending a PR.
 <a href="https://dominikstrb.github.io" target="_blank">★</a>
 <a href="https://tylerbarna.com" target="_blank">★</a>
 <a href="https://daviddmc.github.io/" target="_blank">★</a>
+<a href="https://andreaskuster.ch/" target="_blank">★</a>
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