Bump readme-renderer from 42.0 to 43.0

Bumps [readme-renderer](https://github.com/pypa/readme_renderer) from 42.0 to 43.0.
- [Release notes](https://github.com/pypa/readme_renderer/releases)
- [Changelog](https://github.com/pypa/readme_renderer/blob/main/CHANGES.rst)
- [Commits](pypa/readme_renderer@42.0...43.0)

---
updated-dependencies:
- dependency-name: readme-renderer
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/packaging.txt

@@ -1,2 +1,2 @@
-readme-renderer==42.0
+readme-renderer==43.0
 twine==5.0.0