Update gradient_simplenet.py

Author: koki0702

ch04/gradient_simplenet.py

@@ -20,8 +20,8 @@ def loss(self, x, t):
 
         return loss
 
-x = np.random.rand(2)
-t = np.array([0,0,1])
+x = np.array([0.6, 0.9])
+t = np.array([0, 0, 1])
 
 net = simpleNet()