Update beginner_source/text_sentiment_ngrams_tutorial.py

Author: Svetlana Karslioglu

beginner_source/text_sentiment_ngrams_tutorial.py

@@ -12,7 +12,7 @@
 Prerequisites
 ~~~~~~~~~~~~~~~~
 
-- A recent 2.x version of the ``portalocker`` package needs to be installed prior to running the tutorial.
+A recent 2.x version of the ``portalocker`` package needs to be installed prior to running the tutorial.
 For example, in the Colab environment, this can be done by adding the following line at the top of the script:
 
 .. code-block:: bash