Add yu.ac.kr for Yeungnam University

Official website:
- https://www.yu.ac.kr/main/index.do

Proof that enrolled students use yu.ac.kr:
- https://www.yu.ac.kr/main/intro/yu-news.do?mode=view&articleNo=83967&title=Google+%EA%B3%84%EC%A0%95+%EB%B0%B0%ED%8F%AC+%EC%95%88%EB%82%B4+%28%40yu.ac.kr+%EB%A1%9C%EA%B7%B8%EC%9D%B8+%EA%B3%84%EC%A0%95%29#:~:text=%2D%20%EB%8C%80%ED%95%99%20%ED%8F%AC%ED%84%B8%EB%A1%9C%EA%B7%B8%EC%9D%B8%20%2D%3E%20%22%EC%9B%B9%20%EB%A9%94%EC%9D%BC%22%20%EB%A9%94%EB%89%B4,%EB%90%A9%EB%8B%88%EB%8B%A4.)%20%2D%20%EA%B0%80%EC%9E%85%20%EC%8B%A0%EC%B2%AD%20%EC%A3%BC%EC%86%8C%20:%20http://www.yu.ac.kr
