Update saved_model.ipynb

Updated broken links (i.e. 404 error) with correct links

Author: chunduriv

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](../../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 [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."
       ]
     },
     {
@@ -655,7 +655,7 @@
         "\n",
         "Signatures are the endpoints of a SavedModel—they tell the user how to run the model and what inputs are needed.\n",
         "\n",
-        "In TensorFlow 1, signatures are created by listing the input and output tensors. In TensorFlow 2, signatures are generated by passing in *concrete functions*. (Read more about TensorFlow functions in the [Introduction to graphs and tf.function](../guide/intro_to_graphs) guide.) In short, [a concrete function is generated](../guide/intro_to_graphs#polymorphism_one_function_many_graphs) from a `tf.function`:\n",
+        "In TensorFlow 1, signatures are created by listing the input and output tensors. In TensorFlow 2, signatures are generated by passing in *concrete functions*. (Read more about TensorFlow functions in the [Introduction to graphs and tf.function](https://www.tensorflow.org/guide/intro_to_graphs) guide.) In short, [a concrete function is generated](https://www.tensorflow.org/guide/intro_to_graphs#polymorphism_one_function_many_graphs) from a `tf.function`:\n",
         "\n",
         "```python\n",
         "# Option 1: Specify an input signature.\n",