fix links

Author: MarkDaoust

samples/core/tutorials/keras/save_and_restore_models.ipynb

@@ -95,10 +95,10 @@
         "# Save and restore models\n",
         "\n",
         "<table class=\"tfo-notebook-buttons\" align=\"left\"><td>\n",
-        "<a target=\"_blank\"  href=\"https://colab.research.google.com/github/tensorflow/models/blob/master/samples/core/get_started/save_and_restore_models.ipynb\">\n",
+        "<a target=\"_blank\"  href=\"https://colab.research.google.com/github/tensorflow/models/blob/master/samples/core/tutorials/keras/save_and_restore_models.ipynb\">\n",
         "    <img src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" /><span>Run in Google Colab</span></a>  \n",
         "</td><td>\n",
-        "<a target=\"_blank\"  href=\"https://github.com/tensorflow/models/blob/master/samples/core/get_started/save_and_restore_models.ipynb\"><img width=32px src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" /><span>View source on GitHub</span></a></td></table>\n"
+        "<a target=\"_blank\"  href=\"https://github.com/tensorflow/models/blob/master/samples/core/tutorials/keras/save_and_restore_models.ipynb\"><img width=32px src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" /><span>View source on GitHub</span></a></td></table>\n"
       ]
     },
     {