fix helm CI

Author: jamescripter

.github/workflows/ci.yaml

@@ -47,7 +47,7 @@ jobs:
       - name: Run helm unit tests
         if: steps.list-changed.outputs.changed == 'true'
         run: |
-          helm plugin install https://github.com/helm-unittest/helm-unittest --version=1.1.0
+          helm plugin install https://github.com/helm-unittest/helm-unittest --version=1.1.0 --verify=false
 
           for chart in $(ct --config .github/ct.yaml list-changed); do
             if [ -d "$chart/tests/" ]; then