Documenting Helm support via 3rd party repo (#158)

.gitignore

@@ -1,3 +1,4 @@
 dist/
 bin/
 .idea/
+**/*.pyc

Readme.md

@@ -49,6 +49,7 @@ sys	0m1,069s
 * [Integrating Kubeconform in the CI](#Integrating-Kubeconform-in-the-CI)
   * [Github Workflow](#Github-Workflow)
   * [Gitlab-CI](#Gitlab-CI)
+* [Helm charts](#helm-charts)
 * [Using kubeconform as a Go Module](#Using-kubeconform-as-a-Go-Module)
 * [Credits](#Credits)
 
@@ -325,6 +326,13 @@ lint-kubeconform:
 
 See [issue 106](https://github.com/yannh/kubeconform/issues/106) for more details.
 
+## Helm charts
+
+There is a 3rd party [repository](https://github.com/jtyr/kubeconform-helm) that
+allows to use `kubeconform` to test [Helm charts](https://helm.sh) in the form of
+a [Helm plugin](https://helm.sh/docs/topics/plugins/) and [`pre-commit`
+hook](https://pre-commit.com/).
+
 ## Using kubeconform as a Go Module
 
 **Warning**: This is a work-in-progress, the interface is not yet considered stable. Feedback is encouraged.