Bump k8s.io/code-generator from 0.28.3 to 0.28.4

Bumps [k8s.io/code-generator](https://github.com/kubernetes/code-generator) from 0.28.3 to 0.28.4.
- [Commits](kubernetes/code-generator@v0.28.3...v0.28.4)

---
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]>

go.mod

@@ -50,7 +50,7 @@ require (
 	k8s.io/api v0.28.4
 	k8s.io/apimachinery v0.28.4
 	k8s.io/client-go v0.28.3
-	k8s.io/code-generator v0.28.3
+	k8s.io/code-generator v0.28.4
 	knative.dev/hack v0.0.0-20230417170854-f591fea109b3
 	knative.dev/pkg v0.0.0-20230612155445-74c4be5e935e
 	sigs.k8s.io/release-utils v0.7.6

go.sum

@@ -1245,8 +1245,8 @@ k8s.io/apimachinery v0.28.4 h1:zOSJe1mc+GxuMnFzD4Z/U1wst50X28ZNsn5bhgIIao8=
 k8s.io/apimachinery v0.28.4/go.mod h1:wI37ncBvfAoswfq626yPTe6Bz1c22L7uaJ8dho83mgg=
 k8s.io/client-go v0.28.3 h1:2OqNb72ZuTZPKCl+4gTKvqao0AMOl9f3o2ijbAj3LI4=
 k8s.io/client-go v0.28.3/go.mod h1:LTykbBp9gsA7SwqirlCXBWtK0guzfhpoW4qSm7i9dxo=
-k8s.io/code-generator v0.28.3 h1:I847QvdpYx7xKiG2KVQeCSyNF/xU9TowaDAg601mvlw=
-k8s.io/code-generator v0.28.3/go.mod h1:A2EAHTRYvCvBrb/MM2zZBNipeCk3f8NtpdNIKawC43M=
+k8s.io/code-generator v0.28.4 h1:tcOSNIZQvuAvXhOwpbuJkKbAABJQeyCcQBCN/3uI18c=
+k8s.io/code-generator v0.28.4/go.mod h1:OQAfl6bZikQ/tK6faJ18Vyzo54rUII2NmjurHyiN1g4=
 k8s.io/gengo v0.0.0-20230829151522-9cce18d56c01 h1:pWEwq4Asjm4vjW7vcsmijwBhOr1/shsbSYiWXmNGlks=
 k8s.io/gengo v0.0.0-20230829151522-9cce18d56c01/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=