Merge branch 'master' of https://github.com/2DU/openNAMU

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,4 @@
+<!--
+stable branch로 request를 보내지 마십시오. 개발은 master branch에서 이루어집니다.
+Don't request merge your commit to stable branch, please request to master branch.
+-->