docs: Update minimum k8s version

Author: ThomasVitale

README.md

@@ -37,7 +37,7 @@ This repository contains the following Carvel packages.
 
 ### Prerequisites
 
-* Kubernetes 1.29+
+* Kubernetes 1.30+
 * Carvel [`kctrl`](https://carvel.dev/kapp-controller/docs/latest/install/#installing-kapp-controller-cli-kctrl) CLI.
 * Carvel [kapp-controller](https://carvel.dev/kapp-controller) deployed in your Kubernetes cluster. You can install it with Carvel [`kapp`](https://carvel.dev/kapp/docs/latest/install) (recommended choice) or `kubectl`.