Update dependency ember-cli to v6.6.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ember-cli (source)	6.5.0 -> 6.6.0

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Release Notes

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

v6.6.0

• ember-cli 6.7.0-alpha.1 (minor)

🚀 Enhancement

• ember-cli
  • #​10705 add --strict flag for new app and addon generation (@​mansona)

📝 Documentation

• ember-cli
  • #​10724 Update RELEASE.md to fully document new release-plan setup (@​mansona)

🏠 Internal

• ember-cli
  • #​10731 Prepare Alpha 6.7.0 (@​mansona)
  • #​10728 Prepare Beta 6.6.0 (@​mansona)
  • #​10726 use patched github-changelog for properly rolling up beta changelog (@​mansona)
  • #​10717 pass --publish-branch to release-plan publish (@​mansona)

Committers: 1

• Chris Manson (@​mansona)

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[rustbot]

Unknown labels: A-frontend