[FIX] Fix the link for CS149.en (#776)

Synchronize CS149.en.md with CS149.md

Author: Das1Zhang

docs/并行与分布式系统/CS149.en.md

@@ -14,8 +14,8 @@ The goal of this course is to provide a deep understanding of the fundamental pr
 
 ## Resources
 
-- Course Website: [CMU15418](http://15418.courses.cs.cmu.edu/spring2016/), [CS149](https://gfxcourses.stanford.edu/cs149/fall21)
-- Recordings: [CMU15418](http://15418.courses.cs.cmu.edu/spring2016/lectures), [CS149](https://youtube.com/playlist?list=PLoROMvodv4rMp7MTFr4hQsDEcX7Bx6Odp&si=txtQiRDZ9ZZUzyRn)
+- Course Website: [CMU15418](https://www.cs.cmu.edu/afs/cs/academic/class/15418-s18/www/index.html), [CS149](https://gfxcourses.stanford.edu/cs149/fall21)
+- Recordings: [CMU15418](https://www.cs.cmu.edu/afs/cs/academic/class/15418-s18/www/schedule.html), [CS149](https://youtube.com/playlist?list=PLoROMvodv4rMp7MTFr4hQsDEcX7Bx6Odp&si=txtQiRDZ9ZZUzyRn)
 - Textbook: None
 - Assignments: <https://gfxcourses.stanford.edu/cs149/fall21>, 5 assignments.