Fix old variable name

attachments/mnistKeras3.py

@@ -23,7 +23,7 @@ y_train = to_categorical(y_train, 10)
 y_test  = to_categorical(y_test, 10)
 
 model = Sequential()
-myANN.add(Input((28, 28, 1)))
+model.add(Input((28, 28, 1)))
 model.add(Conv2D(9, kernel_size=(3, 3), activation='relu', kernel_initializer='he_uniform'))
 model.add(MaxPooling2D(2))
 model.add(Flatten())