Update main.go to fix Q logo (#213)

Q logo is not appearing correctly on the terminal while running node. Added a new line character after "Signature check passed" to fix it

Author: rak16

node/main.go

@@ -192,7 +192,7 @@ func main() {
 				os.Exit(1)
 			}
 
-			fmt.Printf("Signature check passed")
+			fmt.Println("Signature check passed")
 		}
 	}