The code for determining which Python version is bundled with which
version of Anaconda has not been updated in a while. I have added 3.10
and 3.11, both of which were used in bundles this year.
I also updated the URL for the source of this data, the Anaconda release
notes, because it has moved.
Anaconda and miniconda have changed their version string format again,
so the parsing needs to be done differently. `add_miniconda.py` can now
parse all existing definition files properly.
This takes inspiration from the similar script for miniconda, but it
simplifies in a couple of ways:
1. Use the GitHub Releases API instead of scraping HTML.
2. Don't perform a diff, simply add the latest release.
Lots of intermediate miniconda releases have been skipped in the past,
and it doesn't seem particularly valuable to backfill those.
