Bump helm/chart-testing-action from 2.4.0 to 2.6.1 (#129)

Bumps [helm/chart-testing-action](https://github.com/helm/chart-testing-action) from 2.4.0 to 2.6.1.
- [Release notes](https://github.com/helm/chart-testing-action/releases)
- [Commits](helm/chart-testing-action@v2.4.0...v2.6.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/charts.yml

@@ -41,7 +41,7 @@ jobs:
       - name: Setup Chart Linting
         if: ${{ github.event_name == 'pull_request' }}
         id: lint
-        uses: helm/chart-testing-action@v2.4.0
+        uses: helm/chart-testing-action@v2.6.1
       - name: Run chart-testing (list-changed)
         if: ${{ github.event_name == 'pull_request' }}
         id: list-changed