Bump tomli from 2.2.1 to 2.4.0 in /python/helpers

Bumps [tomli](https://github.com/hukkin/tomli) from 2.2.1 to 2.4.0.
- [Changelog](https://github.com/hukkin/tomli/blob/master/CHANGELOG.md)
- [Commits](hukkin/tomli@2.2.1...2.4.0)

---
updated-dependencies:
- dependency-name: tomli
  dependency-version: 2.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

python/helpers/requirements.txt

@@ -6,7 +6,7 @@ pipenv==2024.4.1
 plette==2.1.0
 poetry==2.3.2
 # TODO: Replace 3p package `tomli` with 3.11's new stdlib `tomllib` once we drop support for Python 3.10.
-tomli==2.2.1
+tomli==2.4.0
 
 # Some dependencies will only install if Cython is present
 Cython==3.2.4