corrected message (#672)

Co-authored-by: Saurabh Mishra <[email protected]>

http-server/v1/server.go

@@ -5,7 +5,7 @@ import (
 	"net/http"
 )
 
-// PlayerServer currently returns Hello, world given _any_ request.
+// PlayerServer currently returns "20" given _any_ request.
 func PlayerServer(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprint(w, "20")
 }