Update the notebook for the topic cat. tutorial

examples/topic_categorization.ipynb

@@ -6,7 +6,7 @@
    "source": [
     "# Topic Categorization with PySS3\n",
     "<br>\n",
-    "<div style=\"text-align:right\"><i>To open and run this notebook **online**, click here: <a href=\"https://mybinder.org/v2/gh/sergioburdisso/pyss3/master?filepath=examples/topic_categorization.ipynb\" target=\"_blank\"><img src=\"https://mybinder.org/badge_logo.svg\" style=\"display: inline\"></a></i></div>\n",
+    "<div style=\"text-align:right\"><i>To open and run this notebook <b>online</b>, click here: <a href=\"https://mybinder.org/v2/gh/sergioburdisso/pyss3/master?filepath=examples/topic_categorization.ipynb\" target=\"_blank\"><img src=\"https://mybinder.org/badge_logo.svg\" style=\"display: inline\"></a></i></div>\n",
     "\n",
     "This is the notebook for the [\"Topic Categorization\"](https://pyss3.readthedocs.io/en/latest/tutorials/topic-categorization.html) tutorial. In this notebook, we will see how we can use the [PySS3](https://github.com/sergioburdisso/pyss3) Python package to deploy models for Sentiment Analysis on Movie Reviews.\n",
     "\n",