build(deps): bump the examples-ext-authz group

Bumps the examples-ext-authz group in /examples/ext_authz/auth/grpc-service with 2 updates: [github.com/golang/protobuf](https://github.com/golang/protobuf) and [google.golang.org/grpc](https://github.com/grpc/grpc-go).


Updates `github.com/golang/protobuf` from 1.5.3 to 1.5.4
- [Release notes](https://github.com/golang/protobuf/releases)
- [Commits](golang/protobuf@v1.5.3...v1.5.4)

Updates `google.golang.org/grpc` from 1.61.0 to 1.63.0
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.61.0...v1.63.0)

---
updated-dependencies:
- dependency-name: github.com/golang/protobuf
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: examples-ext-authz
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: examples-ext-authz
...

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

examples/ext_authz/auth/grpc-service/go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	github.com/envoyproxy/go-control-plane v0.12.0
-	github.com/golang/protobuf v1.5.3
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20231106174013-bbf56f31fb17
-	google.golang.org/grpc v1.61.0
+	github.com/golang/protobuf v1.5.4
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240227224415-6ceb2ff114de
+	google.golang.org/grpc v1.63.0
 )