Bump helm/chart-testing-action from 2.6.1 to 2.7.0 in the all group

Bumps the all group with 1 update: [helm/chart-testing-action](https://github.com/helm/chart-testing-action).


Updates `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
  dependency-group: all
...

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

.github/workflows/check_charts.yaml

@@ -42,7 +42,7 @@ jobs:
           python-version: '3.x'
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.6.1
+        uses: helm/chart-testing-action@v2.7.0
 
       - name: Run chart-testing (list-changed)
         id: list-changed