Add star to README.md (alshedivat#1684)

Added academic website to README.md.
Also added `_blank` target to earlier ones.

Co-authored-by: George <31376482+george-gca@users.noreply.github.com>

Author: cbueth

README.md

@@ -109,10 +109,11 @@ Feel free to add your own page(s) by sending a PR.
 <a href="https://users.wpi.edu/~lfichera/" target="_blank">★</a>
 <a href="https://anmspro.github.io/" target="_blank">★</a>
 <a href="https://berlyne.net/" target="_blank">★</a>
-<a href="https://filippomazzoli.github.io/">★</a>
-<a href="https://www.escontrela.me/">★</a>
-<a href="https://raffaem.github.io/">★</a>
-<a href="https://kyleaoman.github.io/">★</a>
+<a href="https://filippomazzoli.github.io/" target="_blank">★</a>
+<a href="https://www.escontrela.me/" target="_blank">★</a>
+<a href="https://raffaem.github.io/" target="_blank">★</a>
+<a href="https://cbueth.de/" target="_blank">★</a>
+  <a href="https://kyleaoman.github.io/" target="_blank">★</a>
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