fix(deps): update kubernetes packages to v0.30.3

Author: renovate[bot]

core/go.mod

@@ -37,8 +37,8 @@ require (
 	golang.org/x/sync v0.8.0
 	google.golang.org/grpc v1.65.0
 	gopkg.in/yaml.v3 v3.0.1
-	k8s.io/apimachinery v0.29.3
-	k8s.io/client-go v0.29.3
+	k8s.io/apimachinery v0.30.3
+	k8s.io/client-go v0.30.3
 )
 
 require (