Add support for Python 3.10.6 + release v214

[edmorley]

https://blog.python.org/2022/08/python-3106-is-available.html
https://www.python.org/downloads/release/python-3106/
https://docs.python.org/release/3.10.6/whatsnew/changelog.html#python-3-10-6-final

GUS-W-10333179.

[edmorley]

$ make publish
Deploy as version: v214 [y/n]? y

Tagging commit 5f896a434c29c6835395083503f4768457e9adc1 with v214... 
Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
To https://github.com/heroku/heroku-buildpack-python
 * [new tag]         v214 -> v214

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

Version  Released At               Status
───────  ────────────────────────  ─────────
214      2022-08-02T12:40:39.322Z  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/2452