Added new research blog in README.md (alshedivat#3522)

Author: systemreliability

README.md

@@ -180,6 +180,7 @@ Feel free to add your own page(s) by sending a PR.
 <a href="https://j1yoo.github.io/" target="_blank">★</a>
 <a href="https://zhoji.github.io/" target="_blank">★</a>
 <a href="https://smsnobin77.github.io/" target="_blank">★</a>
+<a href="https://dongkyu-lee.info/" target="_blank">★</a>
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