Prepare release v338

[heroku-linguist]

Commits since the last release:

• Add support for Python 3.12.13, 3.11.15 and 3.10.20 (Add support for Python 3.12.13, 3.11.15 and 3.10.20 #2046)

For the full diff, see the compare view:
v337...main

[edmorley]

$ make publish
Checking environment...
Checking buildpack versions in sync...
Extracting changelog entry for this release...

- The Python 3.12 version alias now resolves to Python 3.12.13. ([#2046](https://github.com/heroku/heroku-buildpack-python/pull/2046))
- The Python 3.11 version alias now resolves to Python 3.11.15. ([#2046](https://github.com/heroku/heroku-buildpack-python/pull/2046))
- The Python 3.10 version alias now resolves to Python 3.10.20. ([#2046](https://github.com/heroku/heroku-buildpack-python/pull/2046))

Deploy as v338 [y/n]? y

Creating GitHub release...
https://github.com/heroku/heroku-buildpack-python/releases/tag/v338

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

 Version Released At              Status    
 ─────── ──────────────────────── ───────── 
 338     2026-03-03T20:32:37.276Z published