* ci: check non-eol versions of PyPy are available on all runners

* fix: install PyPy on Linux ARM64

* ci: remove eol ubuntu-20.04

* Bump @vercel/ncc from 0.38.1 to 0.38.3

Bumps [@vercel/ncc](https://github.com/vercel/ncc) from 0.38.1 to 0.38.3.
- [Release notes](https://github.com/vercel/ncc/releases)
- [Commits](vercel/ncc@0.38.1...0.38.3)

---
updated-dependencies:
- dependency-name: "@vercel/ncc"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

* check failure fix

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Aparna Jyothi <aparnajyothi-y@github.com>

* Support free threaded Python versions like '3.13t'

Python wheels, pyenv, and a number of other tools use 't' in the Python
version number to identify free threaded builds. For example, '3.13t',
'3.14.0a1', '3.14t-dev'.

This PR supports that syntax in `actions/setup-python`, strips the "t",
and adds "-freethreading" to the architecture to select the correct
Python version.

See #771

* Add free threading to advanced usage documentation

* Fix desugaring of `3.13.1t` and add test case.

* Add freethreaded input and fix handling of prerelease versions

* Fix lint

* Add 't' suffix to python-version output

* Use distinct cache key for free threaded Python

* Remove support for syntax like '3.14.0a1'

* Clarify use of 't' suffix

* Improve error message when trying to use free threaded Python versions before 3.13