Added coroutines to expert part

Author: Sebastien Ponce

talk/C++Course.tex

@@ -163,6 +163,7 @@
 \input{expert/cpp20concepts}
 \input{expert/cpp20spaceship}
 \input{expert/modules}
+\input{expert/coroutines}
 
 \section[Tool]{Useful tools}
 \input{tools/editors}