Fixed broken link to documentation

PiperOrigin-RevId: 275488810

examples/image_retraining/README.md

@@ -1,9 +1,9 @@
-retrain.py is an example script that shows how one can adapt a pretrained
+`retrain.py` is an example script that shows how one can adapt a pretrained
 network for other classification problems. A detailed overview of this script
-can be found at: https://www.tensorflow.org/tutorials/image_retraining
+can be found at: https://www.tensorflow.org/hub/tutorials/image_retraining
 
 The script also shows how one can train layers
 with quantized weights and activations instead of taking a pre-trained floating
 point model and then quantizing weights and activations.
-The output graphdef produced by this script is compatible with the TensorFlow
+The output `GraphDef` produced by this script is compatible with the TensorFlow
 Lite Optimizing Converter and can be converted to TFLite format.