Merge pull request #66 from IanBoyanZhang/master

[Doc] Correct Harvard typo

README-cn.md

@@ -316,7 +316,7 @@
 
 - [ ] **编译器**
     - [ ] [编译器是如何在 ~1 分钟内工作（视频）](https://www.youtube.com/watch?v=IhC7sdYe-Jg)
-    - [ ] [Hardvard CS50 —— 编译器（视频）](https://www.youtube.com/watch?v=CSZLNYF4Klo)
+    - [ ] [Harvard CS50 —— 编译器（视频）](https://www.youtube.com/watch?v=CSZLNYF4Klo)
     - [ ] [C++（视频）](https://www.youtube.com/watch?v=twodd1KFfGk)
     - [ ] [掌握编译器的优化（C++）（视频）](https://www.youtube.com/watch?v=FnGCDLhaxKU)