fix test script

Author: filiphaftek

scripts/ci/helm-unittest.sh

@@ -7,7 +7,7 @@ set -euf -o pipefail
 HELM_UNITTEST_VERSION="v1.0.2"
 
 ### Install the helm-unittest plugin
-helm plugin install https://github.com/helm-unittest/helm-unittest --version "$HELM_UNITTEST_VERSION"
+helm plugin install https://github.com/helm-unittest/helm-unittest --version "$HELM_UNITTEST_VERSION" --verify=false
 
 ### Run the helm tests
 helm unittest -q charts/sourcegraph