Prepare release v253

[heroku-linguist[bot]]

Commits since the last release:

• Bump the ruby-dependencies group with 2 updates (#1603)
• Bump rubocop-rspec from 2.31.0 to 3.0.1 (#1604)
• Update comments in binary build script (#1605)
• Improve detection error messages (#1608)

For the full diff, see the compare view: https://github.com/heroku/heroku-buildpack-python/compare/v252...main

[edmorley]

$ make publish
Deploy as version: v253 [y/n]? y

Tagging commit 5263022d8bb2f477fcbc1adace8d402e18285975 with v253... 
Total 0 (delta 0), reused 0 (delta 0), pack-reused 0
To https://github.com/heroku/heroku-buildpack-python
 * [new tag]         v253 -> v253

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

 Version Released At              Status    
 ─────── ──────────────────────── ───────── 
 253     2024-07-01T11:33:18.235Z published