WEB: Adding Effective pandas 2 book to home page
@mattharrison I think you discussed this with @phofl, I need the affiliated link before it's published.

Also, I changed the color palette of the book cover to reduce the size of the file. I don't think it's easy to notice, but if you want to have a look, to make sure you're happy with it. Thanks!

/preview Website preview of this PR available at: https://pandas.pydata.org/preview/pandas-dev/pandas/57164/ Hi @datapythonista . Can I get an email address to attribute referrals from the website? Here's the link https://store.metasnake.com/effective-pandas-book/lhte7 Thanks @mattharrison, this should be ready now  /preview Website preview of this PR available at: https://pandas.pydata.org/preview/pandas-dev/pandas/57164/ Thx @datapythonista 