chore(deps): update helm/chart-testing-action action to v2.7.0 (#125)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/charts-lint.yaml

@@ -56,7 +56,7 @@ jobs:
           helm: "${{ env.HELM_VERSION }}"
 
       - 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 (install)
         run: ct lint --config .ci/ct/ct.yaml --charts "charts/${{ matrix.chart }}"