chore(deps): update helm/chart-testing-action action to v2.8.0

Author: renovate[bot]

.github/workflows/workflow.yml

@@ -54,7 +54,7 @@ jobs:
         if: steps.changes.outputs.chart == 'true'
 
       - name: Helm Chart Testing
-        uses: helm/chart-testing-action@v2.7.0
+        uses: helm/chart-testing-action@v2.8.0
 
       - name: Run chart-testing (list-changed)
         id: list-changed