fix(deps): update KCP versions to v0.28.0 (#28)

Author: nexus49

Taskfile.yml

@@ -7,8 +7,8 @@ vars:
   ENVTEST_K8S_VERSION: "1.30.x"
   ENVTEST_VERSION: release-0.17
   CRD_DIRECTORY: config/crd/bases
-  KCP_APIGEN_VERSION: v0.27.1
-  KCP_VERSION: 0.27.1
+  KCP_APIGEN_VERSION: v0.28.0
+  KCP_VERSION: 0.28.0
   GOMPLATE_VERSION: v4.3.0
   GOARCH:
     sh: go env GOARCH