fix(deps): update module gopkg.in/alecthomas/kingpin.v2 to v2.4.0

Author: renovate[bot]

go.mod

@@ -104,7 +104,7 @@ require (
 	golang.org/x/time v0.8.0
 	google.golang.org/api v0.206.0
 	google.golang.org/grpc v1.68.0
-	gopkg.in/alecthomas/kingpin.v2 v2.2.6
+	gopkg.in/alecthomas/kingpin.v2 v2.4.0
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.1
 	k8s.io/klog v1.0.0