fix the broken image link

Author: joshua1988

README.md

@@ -2,9 +2,7 @@
 
 인프런의 [타입스크립트 입문 - 기초부터 실전까지](https://www.inflearn.com/course/%ED%83%80%EC%9E%85%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-%EC%9E%85%EB%AC%B8) 온라인 강의 리포지토리입니다.
 
-<a href="https://www.inflearn.com/course/%ED%83%80%EC%9E%85%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-%EC%9E%85%EB%AC%B8" target="_blank">
-![typescript-beginner](https://cdn.inflearn.com/public/files/courses/326082/f24fdf92-bbc4-4073-9f7a-db4fb062c9ca/326082-kor-resize.jpg)
-</a>
+[![typescript-beginner](https://cdn.inflearn.com/public/files/courses/326082/f24fdf92-bbc4-4073-9f7a-db4fb062c9ca/326082-kor-resize.jpg)](https://www.inflearn.com/course/%ED%83%80%EC%9E%85%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-%EC%9E%85%EB%AC%B8)
 
 ## 개발 환경
 
@@ -27,4 +25,4 @@
 ## License & Copyright
 
 **Copyright © 2020 Captain Pangyo**
-<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">Creative Commons Attribution-NonCommercial-NoDerivs 4.0 Unported License</a>.
+<a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">Creative Commons Attribution-NonCommercial-NoDerivs 4.0 Unported License</a>.