chore(deps): update dependency ember-cli to v3.28.6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ember-cli (source)	3.28.5 -> 3.28.6

---

Release Notes

ember-cli/ember-cli (ember-cli)

### [`v3.28.6`](https://togithub.com/ember-cli/ember-cli/releases/tag/v3.28.6): Release 3.28.6 [Compare Source](https://togithub.com/ember-cli/ember-cli/compare/v3.28.5...v3.28.6) ##### Blueprint Changes - [`ember new` diff](https://togithub.com/ember-cli/ember-new-output/compare/v3.28.5...v3.28.6) - [`ember addon` diff](https://togithub.com/ember-cli/ember-addon-output/compare/v3.28.5...v3.28.6) ##### Changelog - [#​10013](https://togithub.com/ember-cli/ember-cli/pull/10013) \[BUGFIX] Handle rebuild failures without exiting [@​bendemboski](https://togithub.com/bendemboski) Thank you to all who took the time to contribute!

---

Configuration

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

🚦 Automerge: Enabled.

♻ 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.