Bump helm/chart-testing-action from 2.6.1 to 2.7.0 (#291)

Bumps [helm/chart-testing-action](https://github.com/helm/chart-testing-action) from 2.6.1 to 2.7.0.
- [Release notes](https://github.com/helm/chart-testing-action/releases)
- [Commits](helm/chart-testing-action@v2.6.1...v2.7.0)

---
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>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -117,7 +117,7 @@ jobs:
         python-version: "3.10"
 
     - name: Set up chart-testing
-      uses: helm/chart-testing-action@v2.6.1
+      uses: helm/chart-testing-action@v2.7.0
 
     - name: Lint
       run: ct lint
@@ -163,7 +163,7 @@ jobs:
           python-version: "3.10"
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.6.1
+        uses: helm/chart-testing-action@v2.7.0
 
       # See https://github.com/kubernetes-sigs/kind/releases/tag/v0.17.0
       - name: Determine KinD node image version