Reference non-yanked version of cli_helpers in pyproject.toml

[rolandwalker]

Description

This changes little in practice since the ~= operator is used, but it makes better sense not to point to a yanked version of a dependency.

Checklist

• I added this contribution to the changelog.md file.
• I added my name to the AUTHORS file (or it's already there).
• To lint and format the code, I ran

  uv run ruff check && uv run ruff format && uv run mypy --install-types .

[github-actions]

No findings. This PR only updates a dependency pin in pyproject.toml and adds a changelog entry, so I don’t see correctness, security, or regression risk.

Tests

• Not needed for a version pin change.

If you want extra assurance, the only optional follow-up is to run the existing dependency/lint commands already listed in the PR description.