Use relative link to SavedModel guide in SavedModel migration guide

Author: 8bitmp3

site/en/guide/migrate/saved_model.ipynb

@@ -303,7 +303,7 @@
       "source": [
         "### Save and export a SavedModel defined with tf.Module\n",
         "\n",
-        "To export your model in TensorFlow 2, you must define a `tf.Module` or a `tf.keras.Model` to hold all of your model's variables and functions. Then, you can call `tf.saved_model.save` to create a SavedModel. Refer to [Saving a custom model](../../guide/saved_model#saving_a_custom_model) in the [Using the SavedModel format](https://www.tensorflow.org/guide/saved_model) guide to learn more."
+        "To export your model in TensorFlow 2, you must define a `tf.Module` or a `tf.keras.Model` to hold all of your model's variables and functions. Then, you can call `tf.saved_model.save` to create a SavedModel. Refer to the _Saving a custom model_ section in the [Using the SavedModel format](../saved_model.ipynb) guide to learn more."
       ]
     },
     {