update README (#120)

Signed-off-by: hirokuni-kitahara <[email protected]>

README.md

@@ -139,6 +139,13 @@ of the downloaded artifacts and ensure that the binary's code really comes from
 
 To do so, please follow the instructions [here](https://github.com/slsa-framework/slsa-github-generator#verification-of-provenance).
 
+### Kyverno Integration
+[Kyverno](https://main.kyverno.io/) is an open-source policy engine designed for Kubernetes resources.
+
+It has the built-in feature to verify signed Kubernetes YAML manifests created with k8s-manifest-sigstore project.
+
+Please refer to the [document](https://main.kyverno.io/docs/writing-policies/validate/#manifest-validation) for more details.
+
 ## Security
 
 Should you discover any security issues, please refer to sigstore'ss [security