Update docs/documentation.rst

docs/documentation.rst

@@ -7,7 +7,7 @@ Pyvroom tries to align its functionality close to `VROOM
 <https://github.com/VROOM-Project/vroom/blob/master/docs/API.md>`_ for an
 overview of what VROOM is capable of.
 
-For pragnatic reasons tiny differences might exists here and there. For that
+For pragmatic reasons tiny differences might exist here and there. For that
 reason, use the following reference documentation.
 
 Reference