WEB: Update Python for Data Analysis book
Sounds reasonable to convert the jpg to gif to reduce size. Not too familiar how to do that so any suggestions?  This is the original 30 kb file:

![pydata_book](https://user-images.githubusercontent.com/10058240/189479393-934cd9d3-faa7-4e84-9f8c-0ea654173c23.jpg)

I'd use this version, it's 12kb:

![pydata_book_16colors](https://user-images.githubusercontent.com/10058240/189479268-724d5459-9be3-4868-95c4-ebe249b9877c.gif)

 I can reduce it more, but the new cover has more colors and it's more sensitive than the previous to compression. While probably no big deal, the quality of a smaller version starts to be clearly worse. This is a 8kb image:

![pydata_book_8colors](https://user-images.githubusercontent.com/10058240/189479434-56b3233b-3375-43d4-9669-ebe9b88f7911.gif)
 Thanks, any thoughts whether we should include this for 1.5?