Fix typo.

Author: Ghislain Fourny

README.md

@@ -344,7 +344,7 @@ Even more queries can be found [here](https://colab.research.google.com/github/R
 
 ## Version 0.1.0 alpha 13
 - Allow to bind JSONiq variables to pandas dataframes
-- Allow to retrieve the output of a JSONiq query as a pandas dataframes (if the output is available as a dataframe, i.e., availableOutputs() returns a list that contains "DataFrame")
+- Allow to retrieve the output of a JSONiq query as a pandas dataframe (if the output is available as a dataframe, i.e., availableOutputs() returns a list that contains "DataFrame")
 - Clean up the mapping to strictly map tuples to sequence of items, and lists ot array items. This will avoid confusion between arrays and sequences.
 - As a consequence, json() now returns a tuple, not a list.
 - Calling bind() with a single list will return an informative error. Use bind() with a tuple instead, or call bindOne() to interpret the list as a sequence of one array item.