Fix typo in pruning guide

PiperOrigin-RevId: 374319179

Author: tensorflower-gardener

tensorflow_model_optimization/g3doc/guide/pruning/pruning_with_keras.ipynb

@@ -149,7 +149,7 @@
         "mnist = keras.datasets.mnist\n",
         "(train_images, train_labels), (test_images, test_labels) = mnist.load_data()\n",
         "\n",
-        "# Normalize the input image so that each pixel value is between 0 to 1.\n",
+        "# Normalize the input image so that each pixel value is between 0 and 1.\n",
         "train_images = train_images / 255.0\n",
         "test_images = test_images / 255.0\n",
         "\n",