testing/kind: upgrade to 0.15.0

testing/kind/APKBUILD

 # Contributor: Michał Polański <michal@polanski.me>
 # Maintainer: Michał Polański <michal@polanski.me>
 pkgname=kind
-pkgver=0.14.0
-pkgrel=3
+pkgver=0.15.0
+pkgrel=0
 pkgdesc="Kubernetes IN Docker - local clusters for testing Kubernetes"
 url="https://kind.sigs.k8s.io/"
 license="Apache-2.0"
@@ -45,5 +45,5 @@ package() {
 }
 
 sha512sums="
-655a801cf25d807bb7ea29aecacbb4b16ae6afcd147515ad2462a2ba59156758d4039a21e8d30fbd52c1d406fe4f7ae115956c79cade68eaa403f6e9487ef75e  kind-0.14.0.tar.gz
+e74fe945834566e13e84fcb6c12d9cbab48e9d17fa1aa70f2727af22c93f6732c5e7c2570fe4bbf1a0d7a906a256f1b9584fcf3bd44812e80e818cac93949823  kind-0.15.0.tar.gz
 "