fix failing tests when version changes

Author: ilia-medvedev-codefresh

scripts/helm-unittests.sh

@@ -5,4 +5,4 @@ CHART_DIR="$(cd "$(dirname "$0")/.." && pwd)"
 echo "$CHART_DIR"
 
 echo "Running Helm unittests"
-docker run --entrypoint "/bin/sh" -it --rm -v $CHART_DIR/charts:/charts alpine/helm:3.14.4 -c 'helm plugin install https://github.com/helm-unittest/helm-unittest.git --version 0.5.1 && helm unittest /charts/gitops-runtime'
+docker run -it --rm -v $CHART_DIR/charts:/charts helmunittest/helm-unittest:3.15.3-0.5.1 /charts/gitops-runtime