🌱 Bump k8s.io/code-generator in /hack/tools

Bumps [k8s.io/code-generator](https://github.com/kubernetes/code-generator) from 0.28.0 to 0.28.1.
- [Commits](kubernetes/code-generator@v0.28.0...v0.28.1)

---
updated-dependencies:
- dependency-name: k8s.io/code-generator
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

hack/tools/go.mod

@@ -4,7 +4,7 @@ go 1.20
 
 require (
 	github.com/jteeuwen/go-bindata v3.0.7+incompatible
-	k8s.io/code-generator v0.28.0
+	k8s.io/code-generator v0.28.1
 	sigs.k8s.io/controller-tools v0.12.1
 	sigs.k8s.io/testing_frameworks v0.1.2
 )

hack/tools/go.sum

@@ -1001,8 +1001,8 @@ k8s.io/apiextensions-apiserver v0.27.2 h1:iwhyoeS4xj9Y7v8YExhUwbVuBhMr3Q4bd/laCl
 k8s.io/apiextensions-apiserver v0.27.2/go.mod h1:Oz9UdvGguL3ULgRdY9QMUzL2RZImotgxvGjdWRq6ZXQ=
 k8s.io/apimachinery v0.27.2 h1:vBjGaKKieaIreI+oQwELalVG4d8f3YAMNpWLzDXkxeg=
 k8s.io/apimachinery v0.27.2/go.mod h1:XNfZ6xklnMCOGGFNqXG7bUrQCoR04dh/E7FprV6pb+E=
-k8s.io/code-generator v0.28.0 h1:msdkRVJNVFgdiIJ8REl/d3cZsMB9HByFcWMmn13NyuE=
-k8s.io/code-generator v0.28.0/go.mod h1:ueeSJZJ61NHBa0ccWLey6mwawum25vX61nRZ6WOzN9A=
+k8s.io/code-generator v0.28.1 h1:o0WFcqtv80GEf1iaOAzLIlrKyny9HBd2jaspJfWb5sI=
+k8s.io/code-generator v0.28.1/go.mod h1:ueeSJZJ61NHBa0ccWLey6mwawum25vX61nRZ6WOzN9A=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/gengo v0.0.0-20220902162205-c0856e24416d h1:U9tB195lKdzwqicbJvyJeOXV7Klv+wNAWENRnXEGi08=
 k8s.io/gengo v0.0.0-20220902162205-c0856e24416d/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=