Korean typing error (완형성) on html file.

I found the Korean typing error.
```          <p data-lang="ko">한글 완형성 (U+AC00~U+D7A3)</p>```
That is Correct string 
```          <p data-lang="ko">한글 완성형 (U+AC00~U+D7A3)</p>```

https://github.com/w3c/klreq/blob/gh-pages/index.html#L652
