Bump helm/chart-testing-action from 2.6.1 to 2.7.0 (#10239)

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@e6669bc...0d28d31)

---
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

@@ -36,7 +36,7 @@ jobs:
         uses: azure/setup-helm@fe7b79cd5ee1e45176fcad797de68ecaf3ca4814 # v4.2.0
 
       - name: Install ct
-        uses: helm/chart-testing-action@e6669bcd63d7cb57cb4380c33043eebe5d111992 # v2.6.1
+        uses: helm/chart-testing-action@0d28d3144d3a25ea2cc349d6e59901c4ff469b3b # v2.7.0
 
       - name: Run lint
         run: ct lint --config .github/ct.yaml --all
@@ -88,7 +88,7 @@ jobs:
           helm install stackgres stackgres/stackgres-operator --version 1.13.0 --create-namespace -n stackgres
 
       - name: Install ct
-        uses: helm/chart-testing-action@e6669bcd63d7cb57cb4380c33043eebe5d111992 # v2.6.1
+        uses: helm/chart-testing-action@0d28d3144d3a25ea2cc349d6e59901c4ff469b3b # v2.7.0
 
       - name: Install chart
         run: ct install --config .github/ct.yaml --charts=charts/hedera-mirror --helm-extra-args="--timeout 10m"