Prepare release v327

[heroku-linguist]

Commits since the last release:

• Adjust the error message shown for missing SQLite headers (Adjust the error message shown for missing SQLite headers #2006)
• Remove Python 3.9 support (Remove Python 3.9 support #2005)

For the full diff, see the compare view:
v326...main

[edmorley]

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

- Removed support for Python 3.9. ([#2005](https://github.com/heroku/heroku-buildpack-python/pull/2005))
- Adjusted the error message shown if SQLite headers aren't found during package installation. ([#2006](https://github.com/heroku/heroku-buildpack-python/pull/2006))

Deploy as v327 [y/n]? y

Creating GitHub release...
https://github.com/heroku/heroku-buildpack-python/releases/tag/v327

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

 Version Released At              Status    
 ─────── ──────────────────────── ───────── 
 327     2026-01-07T13:51:11.344Z published