delete extra parentheses (#44)

Author: huiwengoh

fasttext_amazon_reviews/fasttext_amazon_reviews.ipynb

@@ -34,7 +34,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Run the follow [bash script]((https://github.com/cleanlab/examples/blob/master/fasttext_amazon_reviews/download_data.sh) to download all the data.\n",
+    "Run the follow [bash script](https://github.com/cleanlab/examples/blob/master/fasttext_amazon_reviews/download_data.sh) to download all the data.\n",
     "\n",
     "```console\n",
     "$ bash ./download_data.sh\n",