DOC: Fix up auto build procedure to upload Cheat Sheet to web site
Need to fix the procedures so that the PDFs (English, Japanese) for the cheat sheet here: https://github.com/pandas-dev/pandas/tree/master/doc/cheatsheet

get uploaded to here:
https://pandas.pydata.org/Pandas_Cheat_Sheet.pdf

(and when the Japanese one is there, can update the docs to link to it as well)

Note:  If we decide to move the location on the web site, then we should do a redirect, because there are links out there to the cheat sheet in the current location.

Followup to discussion here:  https://github.com/pandas-dev/pandas/issues/40168#issuecomment-819671740