Updated Cheatsheet with some extra functions added
-Added a new page
- Added new functions related to IO tools, Data transform and Visualization.
- -Also applied some new functions like df.isin, df.sample, etc.

[Pandas_CheatSheet (1).pdf](https://github.com/pandas-dev/pandas/files/9836279/Pandas_CheatSheet.1.pdf)



 @phofl I have added a new page with functions like IO tools, Data transform, and visualization.