Update SpiNNaker/README.MD

SpiNNaker/README.MD

 ## Files:
 You can change and use the file names as you prefer. As an example, here we did it as below:
 
-Network: Input(784)*FC1(400)*FC2(1600))
+Network: Input(784)*FC1(400)*FC2(1600)
 
     weights_fc1_X.Y:
         Weight-Files from Input_layer to FC1 layer