chore(deps): update helm/chart-testing-action action to v2.8.0 (#206)

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

Author: renovate[bot]

.github/workflows/test.yaml

@@ -45,7 +45,7 @@ jobs:
           python-version: '3.x'
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.7.0
+        uses: helm/chart-testing-action@v2.8.0
 
       - name: Add Helm repositories
         run: |