Transfer ownership from drivendata user to drivendataorg organization

[jayqi]

Post v2, pre v2.1

• Update GitHub pages website to redirect to new website (follow this procedure) -- see comment below
• Transfer ownership
• Update links in README, etc. for V2

Don't change:

• V1 README instructions to point to new repo: GitHub should redirect this anyways
• V1 README links: these should just redirect, and will be replaced for V2

[jayqi]

I'm going to reorder this to put the GitHub Pages step first. I think it's probably safer to get that sorted out separately before the transfer.

The high-level ideas involved are:

1. Create the user-level GitHub Pages website for the drivendata user (https://drivendata.github.io).
2. Stop deploying/disable the drivendata/cookiecutter-data-science GitHub Pages
3. Create a cookiecutter-data-science page on the drivendata user GitHub Pages website, which should end up with the same URL as the old website. Have this new page do HTML meta redirect to the new https://cookiecutter-data-science.drivendata.org/ URL

Make sure that all works.

The links in the issue description should have some more specific details about how to do the individual steps.

[jayqi]

Just noting here that we needed to "Delete" (not just "Unpublish") the GitHug Pages site before the user Pages version kicked in: https://docs.github.com/en/pages/getting-started-with-github-pages/deleting-a-github-pages-site