Update MNIST_on_TPU.ipynb

Author: FarehaNousheen

examples/notebooks/MNIST_on_TPU.ipynb

@@ -67,9 +67,9 @@
         "id": "4mnaxX3eXNGd"
       },
       "source": [
-        "VERSION = \"1.5\"\n",
-        "!curl https://raw.githubusercontent.com/pytorch/xla/master/contrib/scripts/env-setup.py -o pytorch-xla-env-setup.py\n",
-        "!python pytorch-xla-env-setup.py --version $VERSION"
+        "VERSION = !curl -s https://api.github.com/repos/pytorch/xla/releases/latest | grep -Po '\"tag_name\": \"v\\K.*?(?=\")'\n",
+        "VERSION = VERSION[0].rstrip('.0') # remove trailing zero\n",
+        "!pip install cloud-tpu-client==0.10 https://storage.googleapis.com/tpu-pytorch/wheels/torch_xla-{VERSION}-cp37-cp37m-linux_x86_64.whl"
       ],
       "execution_count": null,
       "outputs": []
@@ -395,4 +395,4 @@
       "outputs": []
     }
   ]
-}
+}