Prepare release v246

[heroku-linguist[bot]]

Commits since the last release:

• Bump pip from 23.3.2 to 24.0 (#1541)
• Bump setuptools from 68.2.2 to 69.2.0 (#1553)
• Bump wheel from 0.42.0 to 0.43.0 (#1550)
• Bump pipenv from 2023.11.15 to 2023.12.1 (#1540)

For the full diff, see the compare view: https://github.com/heroku/heroku-buildpack-python/compare/v245...main

[edmorley]

$ make publish
Deploy as version: v246 [y/n]? y

Tagging commit 1593d55e0dea0efa986d002410d590a9e10e5d42 with v246... 
Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
To https://github.com/heroku/heroku-buildpack-python
 * [new tag]         v246 -> v246

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

 Version Released At              Status    
 ─────── ──────────────────────── ───────── 
 246     2024-03-25T09:52:18.903Z published