chore(deps): update module github.com/kubernetes/code-generator to v0…

….28.4 (#695)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Makefile

@@ -183,7 +183,7 @@ GCI_VERSION ?= v0.11.2
 # renovate: datasource=go depName=sigs.k8s.io/kustomize/kustomize/v5
 KUSTOMIZE_VERSION ?= v5.2.1
 # renovate: datasource=go depName=github.com/kubernetes/code-generator
-CODE_GENERATOR_VERSION ?= v0.28.3
+CODE_GENERATOR_VERSION ?= v0.28.4
 # renovate: datasource=go depName=sigs.k8s.io/controller-tools
 CONTROLLER_TOOLS_VERSION ?= v0.13.0
 # renovate: datasource=go depName=golang.org/x/tools/cmd/goimports packageName=golang.org/x/tools