chore(deps): Bump k8s.io/apimachinery from 0.28.2 to 0.28.3 in /backend

Bumps [k8s.io/apimachinery](https://github.com/kubernetes/apimachinery) from 0.28.2 to 0.28.3.
- [Commits](kubernetes/apimachinery@v0.28.2...v0.28.3)

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

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

backend/go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/stretchr/testify v1.8.4
 	gomodules.xyz/jsonpatch/v2 v2.4.0
 	k8s.io/api v0.28.2
-	k8s.io/apimachinery v0.28.2
+	k8s.io/apimachinery v0.28.3
 	k8s.io/client-go v0.28.2
 	sigs.k8s.io/controller-runtime v0.16.2
 	sigs.k8s.io/kubectl-validate v0.0.1

backend/go.sum

@@ -2413,8 +2413,8 @@ k8s.io/apiextensions-apiserver v0.28.1 h1:l2ThkBRjrWpw4f24uq0Da2HaEgqJZ7pcgiEUTK
 k8s.io/apiextensions-apiserver v0.28.1/go.mod h1:sVvrI+P4vxh2YBBcm8n2ThjNyzU4BQGilCQ/JAY5kGs=
 k8s.io/apimachinery v0.20.1/go.mod h1:WlLqWAHZGg07AeltaI0MV5uk1Omp8xaN0JGLY6gkRpU=
 k8s.io/apimachinery v0.20.2/go.mod h1:WlLqWAHZGg07AeltaI0MV5uk1Omp8xaN0JGLY6gkRpU=
-k8s.io/apimachinery v0.28.2 h1:KCOJLrc6gu+wV1BYgwik4AF4vXOlVJPdiqn0yAWWwXQ=
-k8s.io/apimachinery v0.28.2/go.mod h1:RdzF87y/ngqk9H4z3EL2Rppv5jj95vGS/HaFXrLDApU=
+k8s.io/apimachinery v0.28.3 h1:B1wYx8txOaCQG0HmYF6nbpU8dg6HvA06x5tEffvOe7A=
+k8s.io/apimachinery v0.28.3/go.mod h1:uQTKmIqs+rAYaq+DFaoD2X7pcjLOqbQX2AOiO0nIpb8=
 k8s.io/apiserver v0.20.1/go.mod h1:ro5QHeQkgMS7ZGpvf4tSMx6bBOgPfE+f52KwvXfScaU=
 k8s.io/apiserver v0.20.2/go.mod h1:2nKd93WyMhZx4Hp3RfgH2K5PhwyTrprrkWYnI7id7jA=
 k8s.io/apiserver v0.28.2 h1:rBeYkLvF94Nku9XfXyUIirsVzCzJBs6jMn3NWeHieyI=