Update Pull Request Templates (#25)

* Update PULL_REQUEST_TEMPLATE.md

* Add link for guide

Author: hg-pyun

.github/PULL_REQUEST_TEMPLATE.md

@@ -11,3 +11,11 @@ https://github.com/reactjs/reactjs.org/blob/master/CONTRIBUTING.md
 If your PR references an existing issue, please add the issue number below
 
 -->
+
+## Progress
+
+- [ ] 번역 초안 작성(Draft translation)
+- [ ] [공통 스타일 가이드 확인 (Check the common style guide)](link)
+- [ ] [용어 확인 (Check the term)](link)
+- [ ] [맞춤법 검사 (Spelling check)](http://speller.cs.pusan.ac.kr/)
+- [ ] 리뷰 반영 (Resolve reviews)