Fix: address linting issues in two tower notebook

The build is failing due to tensorflow missing. Adding this dependency.

notebooks/official/matching_engine/two-tower-model-introduction.ipynb

@@ -8,7 +8,7 @@
       },
       "outputs": [],
       "source": [
-        "# Copyright 2021 Google LLC\n",
+        "# Copyright 2022 Google LLC\n",
         "#\n",
         "# Licensed under the Apache License, Version 2.0 (the \"License\");\n",
         "# you may not use this file except in compliance with the License.\n",
@@ -268,7 +268,7 @@
         "\n",
         "# Get your Google Cloud project ID from gcloud\n",
         "if not os.getenv(\"IS_TESTING\"):\n",
-        "    shell_output=! gcloud config list --format 'value(core.project)' 2>/dev/null\n",
+        "    shell_output = ! gcloud config list --format 'value(core.project)' 2>/dev/null\n",
         "    PROJECT_ID = shell_output[0]\n",
         "    print(\"Project ID: \", PROJECT_ID)"
       ]
@@ -497,7 +497,6 @@
       },
       "outputs": [],
       "source": [
-        "import json\n",
         "import os\n",
         "import re\n",
         "import time\n",

notebooks/official/migration/UJ4 Vertex SDK AutoML Tabular Binary Classification.ipynb

@@ -147,7 +147,7 @@
         "id": "install_storage"
       },
       "source": [
-        "Install the latest GA version of *google-cloud-storage* library as well."
+        "Install the latest GA version of *google-cloud-storage* and *tensorflow* libraries as well."
       ]
     },
     {
@@ -158,7 +158,7 @@
       },
       "outputs": [],
       "source": [
-        "! pip3 install -U google-cloud-storage $USER_FLAG"
+        "! pip3 install -U google-cloud-storage tensorflow $USER_FLAG"
       ]
     },
     {