[web] [docs] [ENG-935] add python2 dep in documentation
Summary:
Add python2 info to documentation
https://linear.app/comm/issue/ENG-935/add-python2-docs
Test Plan: Delete python2 from your machine and re-download it from the url provided. Update to macOS 12.3 and download python from url provided.
Reviewers: varun, palys-swm, karol-bisztyga, atul, ashoat
Reviewed By: varun, ashoat
Subscribers: ashoat, atul, palys-swm, Adrian, karol-bisztyga, yayabosh
Differential Revision: https://phabricator.ashoat.com/D3536