Update devDependency beachball to v2.31.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
beachball (source)	2.31.5 -> 2.31.6

---

Release Notes

microsoft/beachball

### [`v2.31.6`](https://togithub.com/microsoft/beachball/compare/1edbca7612137d718ce58f6881d6c85681bba91c...2f6e0242471f586735e96dd2838277adcfa8d3b4) [Compare Source](https://togithub.com/microsoft/beachball/compare/1edbca7612137d718ce58f6881d6c85681bba91c...2f6e0242471f586735e96dd2838277adcfa8d3b4)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.