chore(deps): bump helm/chart-testing-action from 2.7.0 to 2.8.0

Bumps [helm/chart-testing-action](https://github.com/helm/chart-testing-action) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/helm/chart-testing-action/releases)
- [Commits](helm/chart-testing-action@0d28d31...6ec842c)

---
updated-dependencies:
- dependency-name: helm/chart-testing-action
  dependency-version: 2.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/helm-chart-lint.yml

@@ -31,7 +31,7 @@ jobs:
           python-version: "3.x"
 
       - name: Set-up chart-testing
-        uses: helm/chart-testing-action@0d28d3144d3a25ea2cc349d6e59901c4ff469b3b
+        uses: helm/chart-testing-action@6ec842c01de15ebb84c8627d2744a0c2f2755c9f
 
       - name: Run chart-testing (lint)
         run: ct lint --chart-dirs=helm --charts=helm/provisioner --lint-conf=helm/lintconf.yaml --check-version-increment=false --validate-maintainers=false