Bump k8s.io/apimachinery from 0.31.3 to 0.31.4 in /backend (#433)

Bumps [k8s.io/apimachinery](https://github.com/kubernetes/apimachinery) from 0.31.3 to 0.31.4.
- [Commits](kubernetes/apimachinery@v0.31.3...v0.31.4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/go.mod

@@ -22,7 +22,7 @@ require (
 	golang.org/x/sync v0.10.0
 	golang.org/x/text v0.21.0
 	k8s.io/api v0.31.3
-	k8s.io/apimachinery v0.31.3
+	k8s.io/apimachinery v0.31.4
 	k8s.io/client-go v0.31.3
 )
 

backend/go.sum

@@ -255,8 +255,8 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 k8s.io/api v0.31.3 h1:umzm5o8lFbdN/hIXbrK9oRpOproJO62CV1zqxXrLgk8=
 k8s.io/api v0.31.3/go.mod h1:UJrkIp9pnMOI9K2nlL6vwpxRzzEX5sWgn8kGQe92kCE=
-k8s.io/apimachinery v0.31.3 h1:6l0WhcYgasZ/wk9ktLq5vLaoXJJr5ts6lkaQzgeYPq4=
-k8s.io/apimachinery v0.31.3/go.mod h1:rsPdaZJfTfLsNJSQzNHQvYoTmxhoOEofxtOsF3rtsMo=
+k8s.io/apimachinery v0.31.4 h1:8xjE2C4CzhYVm9DGf60yohpNUh5AEBnPxCryPBECmlM=
+k8s.io/apimachinery v0.31.4/go.mod h1:rsPdaZJfTfLsNJSQzNHQvYoTmxhoOEofxtOsF3rtsMo=
 k8s.io/client-go v0.31.3 h1:CAlZuM+PH2cm+86LOBemaJI/lQ5linJ6UFxKX/SoG+4=
 k8s.io/client-go v0.31.3/go.mod h1:2CgjPUTpv3fE5dNygAr2NcM8nhHzXvxB8KL5gYc3kJs=
 k8s.io/klog/v2 v2.130.1 h1:n9Xl7H1Xvksem4KFG4PYbdQCQxqc/tTUyrgXaOhHSzk=