Improve comparison formatting

Author: nhooyr

README.md

@@ -94,7 +94,7 @@ c.Close(websocket.StatusNormalClosure, "")
 
 While I believe nhooyr/websocket has a better API than existing libraries, 
 both gorilla/websocket and gobwas/ws were extremely useful in implementing the
-WebSocket protocol correctly so **big thanks** to the authors of both. In particular,
+WebSocket protocol correctly so *big thanks* to the authors of both. In particular,
 I made sure to go through the issue tracker of gorilla/websocket to make sure
 I implemented details correctly and understood how people were using the package
 in production.