Add support for Python 3.10.7

[edmorley]

https://www.python.org/downloads/release/python-3107/
https://docs.python.org/release/3.10.7/whatsnew/changelog.html#python-3-10-7-final

GUS-W-10333180.

[edmorley]

Published:

$ make publish
Deploy as version: v217 [y/n]? y

Tagging commit 5a894390096f965439e392e3d520b55604296184 with v217... 
Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
To https://github.com/heroku/heroku-buildpack-python
 * [new tag]         v217 -> v217

Publishing to the buildpack registry...
Two-factor code: ********************************************
Publishing buildpack heroku/python... done
Publishing buildpack was successful

Version  Released At               Status
───────  ────────────────────────  ─────────
217      2022-09-06T19:26:24.399Z  published

https://devcenter.heroku.com/articles/python-support#specifying-a-python-version
https://devcenter.heroku.com/articles/python-runtimes#selecting-a-runtime
https://devcenter.heroku.com/changelog-items/2465