build(deps): bump github.com/envoyproxy/go-control-plane/envoy from 1.37.1-0.20260409050421-3f47accd6e14 to 1.39.0 in /examples/simple-extension-server (#9792)

build(deps): bump github.com/envoyproxy/go-control-plane/envoy

Bumps [github.com/envoyproxy/go-control-plane/envoy](https://github.com/envoyproxy/go-control-plane) from 1.37.1-0.20260409050421-3f47accd6e14 to 1.39.0.
- [Release notes](https://github.com/envoyproxy/go-control-plane/releases)
- [Changelog](https://github.com/envoyproxy/go-control-plane/blob/main/CHANGELOG.md)
- [Commits](https://github.com/envoyproxy/go-control-plane/commits/envoy/v1.39.0)

---
updated-dependencies:
- dependency-name: github.com/envoyproxy/go-control-plane/envoy
  dependency-version: 1.39.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

examples/simple-extension-server/go.mod

@@ -4,7 +4,7 @@ go 1.26.6
 
 require (
 	github.com/envoyproxy/gateway v1.8.3
-	github.com/envoyproxy/go-control-plane/envoy v1.37.1-0.20260409050421-3f47accd6e14
+	github.com/envoyproxy/go-control-plane/envoy v1.39.0
 	github.com/urfave/cli/v2 v2.27.7
 	google.golang.org/grpc v1.83.0
 )

examples/simple-extension-server/go.sum

@@ -8,8 +8,8 @@ github.com/cpuguy83/go-md2man/v2 v2.0.7 h1:zbFlGlXEAKlwXpmvle3d8Oe3YnkKIK4xSRTd3
 github.com/cpuguy83/go-md2man/v2 v2.0.7/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/envoyproxy/gateway v1.8.3 h1:RY8DKli7Z1w3WuMwbA8J5j2sriIxXTWjVv1Bk77nbHo=
 github.com/envoyproxy/gateway v1.8.3/go.mod h1:d15/KaY3foUbdloVTHYhikiFT6YFzUu1AaH9SZjGNS0=
-github.com/envoyproxy/go-control-plane/envoy v1.37.1-0.20260409050421-3f47accd6e14 h1:zEzMNlk4Kb4GpwKt2pmEc2B5+iM9rcmUYoB0mGHhXyU=
-github.com/envoyproxy/go-control-plane/envoy v1.37.1-0.20260409050421-3f47accd6e14/go.mod h1:5yRfenlmRH8sxKrhXyiFtK8BDz3syDWcFm81rkCcATM=
+github.com/envoyproxy/go-control-plane/envoy v1.39.0 h1:1uwRDYPYG8BIBU9Mj1sUAebNmlM6beu/ZKKweSLDxk8=
+github.com/envoyproxy/go-control-plane/envoy v1.39.0/go.mod h1:5e4ylfTZO723MEEFsCpSW4ZEBWR8mwkEyXfwJBTCZ9c=
 github.com/envoyproxy/protoc-gen-validate v1.3.3 h1:MVQghNeW+LZcmXe7SY1V36Z+WFMDjpqGAGacLe2T0ds=
 github.com/envoyproxy/protoc-gen-validate v1.3.3/go.mod h1:TsndJ/ngyIdQRhMcVVGDDHINPLWB7C82oDArY51KfB0=
 github.com/go-logr/logr v1.4.4 h1:tG4xh9yMsRCAiodLVTxyrkzSZ9+o0L1Kg/+cPVcbP/8=