Added a System Design Course (Updated) (#10278)

System Design Course By ByteByteGo

courses/free-courses-en.md

@@ -1527,6 +1527,7 @@
 ### System Design
 
 * [System Design](https://www.youtube.com/playlist?list=PLMCXHnjXnTnvo6alSjVkgxV-VH6EPyvoX) - Gaurav Sen
+* [System Design Fundamentals](https://www.youtube.com/playlist?list=PLCRMIe5FDPsd0gVs500xeOewfySTsmEjf) - ByteByteGo
 * [System Design Primer Course](https://www.youtube.com/playlist?list=PLTCrU9sGyburBw9wNOHebv9SjlE4Elv5a) - sudoCODE