🌱 Bump sigs.k8s.io/kubebuilder/v3 from 3.15.0 to 3.15.1 in /docs/book/src/simple-external-plugin-tutorial/testdata/sampleexternalplugin/v1

🌱 Bump sigs.k8s.io/kubebuilder/v3 from 3.15.0 to 3.15.1 in /docs/book/src/simple-external-plugin-tutorial/testdata/sampleexternalplugin/v1 #5189