Added one more researcher using al-folio (cotes2020#2105)

Added my own website as a star to the "Academics" section

Author: JonaRuthardt

README.md

@@ -130,6 +130,7 @@ Feel free to add your own page(s) by sending a PR.
 <a href="https://tinkerer.in" target="_blank">★</a>
 <a href="https://sam-bieberich.github.io/" target="_blank">★</a>
 <a href="https://afraniomelo.github.io/en/" target="_blank">★</a>
+<a href="https://jonaruthardt.github.io" target="_blank">★</a>
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