fix(deps): update helm to v4

Author: renovate[bot]

go.mod

@@ -57,7 +57,7 @@ require (
 	golang.org/x/oauth2 v0.36.0
 	golang.org/x/text v0.37.0
 	gopkg.in/yaml.v3 v3.0.1
-	helm.sh/helm/v3 v3.21.0
+	helm.sh/helm/v4 v4.2.0
 	k8s.io/api v0.36.0
 	k8s.io/apiextensions-apiserver v0.36.0
 	k8s.io/apimachinery v0.36.0