chore(deps): update helm/chart-testing-action action to v2.8.0 (#209)

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

* remove yamale bump workaround (default is now yamale:6.0.0)

---------

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -17,11 +17,7 @@ jobs:
           python-version: "3.14"
           check-latest: true
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.7.0
-        with:
-          # Workaround as default 4.0.4 doesn't work with python 3.14
-          # See https://github.com/helm/chart-testing-action/issues/177
-          yamale_version: "6.0.0"
+        uses: helm/chart-testing-action@v2.8.0
       - name: Add dependency repos
         run: |
           helm repo add bitnami https://charts.bitnami.com/bitnami