chore(deps): bump knative.dev/serving from 0.46.2 to 0.46.4

Bumps [knative.dev/serving](https://github.com/knative/serving) from 0.46.2 to 0.46.4.
- [Release notes](https://github.com/knative/serving/releases)
- [Commits](knative/serving@v0.46.2...v0.46.4)

---
updated-dependencies:
- dependency-name: knative.dev/serving
  dependency-version: 0.46.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

go.mod

@@ -50,7 +50,7 @@ require (
 	k8s.io/utils v0.0.0-20250604170112-4c0f3b243397
 	knative.dev/eventing v0.46.2
 	knative.dev/pkg v0.0.0-20250821143151-4ffdcf6b3fa5
-	knative.dev/serving v0.46.2
+	knative.dev/serving v0.46.4
 	sigs.k8s.io/controller-runtime v0.21.0
 	sigs.k8s.io/structured-merge-diff/v4 v4.7.0
 )

go.sum

@@ -476,8 +476,8 @@ knative.dev/networking v0.0.0-20250821144952-042b64d7bbde h1:Gr1rIK8Zx+tO+NLrhSJ
 knative.dev/networking v0.0.0-20250821144952-042b64d7bbde/go.mod h1:sjPfq6T/exWuYK9w+CF4E59bU8m2dlJAgnRdK5wo9k0=
 knative.dev/pkg v0.0.0-20250821143151-4ffdcf6b3fa5 h1:2U4nNoTuF/3enFcPp1BVQXCjUC4XfieIHkZeuU7j8uA=
 knative.dev/pkg v0.0.0-20250821143151-4ffdcf6b3fa5/go.mod h1:ewap/fhCZCh6Gm+F6udBION8T2+UcJFK4L1Ss/5K8Dw=
-knative.dev/serving v0.46.2 h1:xY3hoHXklytIpGdBNNToQP2oMEV6hhZQ/g3c0CCr2Fk=
-knative.dev/serving v0.46.2/go.mod h1:FXqTSod2TLA+AB83ZWH9Fmrn4R12ZRomb8thBpzqsWk=
+knative.dev/serving v0.46.4 h1:VY0ZgKEpajKd5qkSUpHJkH/M2FrVZ14oP8bzBbPn/7c=
+knative.dev/serving v0.46.4/go.mod h1:FXqTSod2TLA+AB83ZWH9Fmrn4R12ZRomb8thBpzqsWk=
 sigs.k8s.io/controller-runtime v0.21.0 h1:CYfjpEuicjUecRk+KAeyYh+ouUBn4llGyDYytIGcJS8=
 sigs.k8s.io/controller-runtime v0.21.0/go.mod h1:OSg14+F65eWqIu4DceX7k/+QRAbTTvxeQSNSOQpukWM=
 sigs.k8s.io/gateway-api v1.1.0 h1:DsLDXCi6jR+Xz8/xd0Z1PYl2Pn0TyaFMOPPZIj4inDM=