Prepare release v340

[heroku-linguist]

Commits since the last release:

• Bump json from 2.18.1 to 2.19.2 (Bump json from 2.18.1 to 2.19.2 #2055)
• Add binary build support for Heroku-26 (Add binary build support for Heroku-26 #2056)
• Fix GUSINFO metadata in CODEOWNERS (Fix GUSINFO metadata in CODEOWNERS #2059)
• Bump rubocop from 1.85.0 to 1.86.0 in the ruby-dependencies group (Bump rubocop from 1.85.0 to 1.86.0 in the ruby-dependencies group #2061)
• Bump uv from 0.10.9 to 0.11.3 (Bump uv from 0.10.9 to 0.11.3 #2067)
• Bump poetry from 2.3.2 to 2.3.3 (Bump poetry from 2.3.2 to 2.3.3 #2064)
• Bump pipenv from 2026.0.3 to 2026.5.1 (Bump pipenv from 2026.0.3 to 2026.5.1 #2065)

For the full diff, see the compare view:
v339...main

[edmorley]

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

- Updated Pipenv from 2026.0.3 to 2026.5.1. ([#2065](https://github.com/heroku/heroku-buildpack-python/pull/2065))
- Updated Poetry from 2.3.2 to 2.3.3. ([#2064](https://github.com/heroku/heroku-buildpack-python/pull/2064))
- Updated uv from 0.10.9 to 0.11.3. ([#2067](https://github.com/heroku/heroku-buildpack-python/pull/2067))

Deploy as v340 [y/n]? y

Creating GitHub release...
https://github.com/heroku/heroku-buildpack-python/releases/tag/v340

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

 Version Released At              Status    
 ─────── ──────────────────────── ───────── 
 340     2026-04-02T12:39:58.712Z published 

[edmorley]

https://devcenter.heroku.com/changelog-items/3635