Update template buttons.

Added missing "download" button.

PiperOrigin-RevId: 414328509

Author: MarkDaoust

tools/templates/subsite/g3doc/tutorials/notebook.ipynb

@@ -48,19 +48,16 @@
       "source": [
         "<table class=\"tfo-notebook-buttons\" align=\"left\">\n",
         "  <td>\n",
-        "    <a target=\"_blank\" href=\"https://www.tensorflow.org/{PATH}\">\n",
-        "    <img src=\"https://www.tensorflow.org/images/tf_logo_32px.png\" />\n",
-        "    View on TensorFlow.org</a>\n",
+        "    <a target=\"_blank\" href=\"https://www.tensorflow.org/{TENSORFLOW_PATH}\"><img src=\"https://www.tensorflow.org/images/tf_logo_32px.png\" />View on TensorFlow.org</a>\n",
         "  </td>\n",
         "  <td>\n",
-        "    <a target=\"_blank\" href=\"https://colab.research.google.com/github/tensorflow/docs/blob/master/tools/templates/subsite/g3doc/tutorials/notebook.ipynb\">\n",
-        "    <img src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" />\n",
-        "    Run in Google Colab</a>\n",
+        "    <a target=\"_blank\" href=\"https://colab.research.google.com/github/{GITHUB_PATH}\"><img src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" />Run in Google Colab</a>\n",
         "  </td>\n",
         "  <td>\n",
-        "    <a target=\"_blank\" href=\"https://github.com/tensorflow/docs/blob/master/tools/templates/subsite/g3doc/tutorials/notebook.ipynb\">\n",
-        "    <img src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" />\n",
-        "    View source on GitHub</a>\n",
+        "    <a target=\"_blank\" href=\"https://github.com/{GITHUB_PATH}\"><img src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" />View source on GitHub</a>\n",
+        "  </td>\n",
+        "  <td>\n",
+        "    <a href=\"https://storage.googleapis.com/tensorflow_docs/docs/site/en/{TENSORFLOW_PATH}.ipynb\"><img src=\"https://www.tensorflow.org/images/download_logo_32px.png\" />Download notebook</a>\n",
         "  </td>\n",
         "</table>"
       ]