Update _episodes/04-data-types-and-format.md

Author: orchid00

_episodes/04-data-types-and-format.md

@@ -17,7 +17,7 @@ objectives:
 keypoints:
     - Python uses two main data types text and numeric, these have a different names in basic Python and Pandas
     - Each column in a DataFrame has a shared data type for all rows
-    - You can convert any data type to another type
+    - Any data type can be converted to another type
     - You can discard or change null values
     - After manipulating a DataFrame you can save it in a CSV file