build(deps): bump google.golang.org/grpc in /examples/extension-server

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.67.0 to 1.67.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.67.0...v1.67.1)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

examples/extension-server/go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/envoyproxy/gateway v1.0.2
 	github.com/envoyproxy/go-control-plane v0.13.1-0.20240917224354-20d038a70568
 	github.com/urfave/cli/v2 v2.27.4
-	google.golang.org/grpc v1.67.0
+	google.golang.org/grpc v1.67.1
 	google.golang.org/protobuf v1.34.2
 	k8s.io/apimachinery v0.31.1
 	sigs.k8s.io/controller-runtime v0.19.0

examples/extension-server/go.sum

@@ -109,8 +109,8 @@ google.golang.org/genproto/googleapis/api v0.0.0-20240924160255-9d4c2d233b61 h1:
 google.golang.org/genproto/googleapis/api v0.0.0-20240924160255-9d4c2d233b61/go.mod h1:O6rP0uBq4k0mdi/b4ZEMAZjkhYWhS815kCvaMha4VN8=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20240924160255-9d4c2d233b61 h1:N9BgCIAUvn/M+p4NJccWPWb3BWh88+zyL0ll9HgbEeM=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20240924160255-9d4c2d233b61/go.mod h1:UqMtugtsSgubUsoxbuAoiCXvqvErP7Gf0so0mK9tHxU=
-google.golang.org/grpc v1.67.0 h1:IdH9y6PF5MPSdAntIcpjQ+tXO41pcQsfZV2RxtQgVcw=
-google.golang.org/grpc v1.67.0/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
+google.golang.org/grpc v1.67.1 h1:zWnc1Vrcno+lHZCOofnIMvycFcc0QRGIzm9dhnDX68E=
+google.golang.org/grpc v1.67.1/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
 google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
 google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=