Add comment on helm 4

Author: sbernauer

go.mod

@@ -4,7 +4,12 @@ go 1.26.0
 
 require (
 	github.com/mittwald/go-helm-client v0.12.19
+
+	# We can not bump to helm 4 yet:
+	# > go.mod:8:2: require helm.sh/helm/v3: version "v4.1.1" invalid: should be v3, not v4
+	# Related helm 4 issue: https://github.com/stackabletech/issues/issues/814
 	helm.sh/helm/v3 v3.20.0
+
 	k8s.io/client-go v0.35.2
 )