Prepare release v298 (#1862)

Co-authored-by: heroku-linguist[bot] <136119646+heroku-linguist[bot]@users.noreply.github.com>

Author: heroku-linguist[bot]

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## [Unreleased]
 
+
+## [v298] - 2025-08-06
+
 - The Python 3.13 version alias now resolves to Python 3.13.6. ([#1861](https://github.com/heroku/heroku-buildpack-python/pull/1861))
 - Fixed the stack version check to correctly show the "stack not supported" error message for the EOL Heroku-20, instead of "stack not recognised". ([#1860](https://github.com/heroku/heroku-buildpack-python/pull/1860))
 
@@ -1281,7 +1284,8 @@ Default Python is now latest 2.7.10. Updated pip and Distribute.
 - Setuptools updated to v16.0
 - pip updated to v7.0.1
 
-[unreleased]: https://github.com/heroku/heroku-buildpack-python/compare/v297...main
+[unreleased]: https://github.com/heroku/heroku-buildpack-python/compare/v298...main
+[v298]: https://github.com/heroku/heroku-buildpack-python/compare/v297...v298
 [v297]: https://github.com/heroku/heroku-buildpack-python/compare/v296...v297
 [v296]: https://github.com/heroku/heroku-buildpack-python/compare/v295...v296
 [v295]: https://github.com/heroku/heroku-buildpack-python/compare/v294...v295