update predict_image argument mismatch

Found same issue from #46 in transfer learning example

05c - Transfer Learning (Tensorflow).ipynb

@@ -306,7 +306,7 @@
     "def predict_image(classifier, image):\n",
     "    from tensorflow import convert_to_tensor\n",
     "    # The model expects a batch of images as input, so we'll create an array of 1 image\n",
-    "    imgfeatures = img.reshape(1, img.shape[0], img.shape[1], img.shape[2])\n",
+    "    imgfeatures = image.reshape(1, image.shape[0], image.shape[1], img.shape[2])\n",
     "\n",
     "    # We need to format the input to match the training data\n",
     "    # The generator loaded the values as floating point numbers\n",