chore(ci/cd): unpin helm-unittest image and pull from dsbacr

.github/workflows/verify.yml

@@ -25,19 +25,16 @@ jobs:
       - name: Run linting (helm)
         run: helm lint charts/*
 
-      - name: Run Helm Unittests
-        # TODO: version is pinned to '3.14.3-0.4.4' workaround
-        # bug https://github.com/helm-unittest/helm-unittest/issues/329
-        # was fixed in 'v0.5.1' but docker image is missing ref. https://github.com/helm-unittest/helm-unittest/issues/348
-        run: docker run --rm --name unittest --volume "$(pwd)":/apps helmunittest/helm-unittest:3.14.3-0.4.4 charts/*
-
       - name: log into azure container registry (ACR)
         uses: azure/docker-login@v2
         with:
           login-server: dsbacr.azurecr.io
           username: ${{ vars.ORG_AZURE_CONTAINER_REGISTRY_USER }}
           password: ${{ secrets.ORG_AZURE_CONTAINER_REGISTRY_PASSWORD }}
 
+      - name: Run Helm Unittests
+        run: docker run --rm --name unittest --volume "$(pwd)":/apps dsbacr.azurecr.io/cache/docker-io/helmunittest/helm-unittest charts/*
+
       - uses: actions/setup-python@v5
         with:
           python-version: "3.9"