Update quay.io/helmpack/chart-testing Docker tag to v3.8.0

This MR contains the following updates:

Package	Type	Update	Change
quay.io/helmpack/chart-testing	ironbank-docker	minor	v3.7.1 -> v3.8.0
quay.io/helmpack/chart-testing		minor	v3.7.1 -> v3.8.0
quay.io/helmpack/chart-testing	stage	minor	v3.7.1 -> v3.8.0

---

Release Notes

helm/chart-testing

v3.8.0

Compare Source

What's Changed

• add skip-clean-up option to not remove the charts when finishing the tests by @​cpanato in https://github.com/helm/chart-testing/pull/478
• add .ct in current working-directory as config directory by @​itscaro in https://github.com/helm/chart-testing/pull/479
• Fix parsing kubectl output with warnings by @​usmonster in https://github.com/helm/chart-testing/pull/470
• Upgrade to go 120 by @​cpanato in https://github.com/helm/chart-testing/pull/523
• Update docs and examples for v3.7.1 by @​ljtill in https://github.com/helm/chart-testing/pull/527
• sync version comments, update actions and update cosign flag by @​cpanato in https://github.com/helm/chart-testing/pull/538

New Contributors

• @​itscaro made their first contribution in https://github.com/helm/chart-testing/pull/479
• @​usmonster made their first contribution in https://github.com/helm/chart-testing/pull/470
• @​dklimpel made their first contribution in https://github.com/helm/chart-testing/pull/534
• @​ljtill made their first contribution in https://github.com/helm/chart-testing/pull/527

Full Changelog: https://github.com/helm/chart-testing/compare/v3.7.1...v3.8.0

---

Configuration

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

🚦 Automerge: Enabled.

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

🔕 Ignore: Close this MR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this MR, check this box

---

This MR has been generated by Renovate Bot.