Bump google.golang.org/grpc in /tools/benchmarking_eventing

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.48.0 to 1.56.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.48.0...v1.56.3)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
...

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

tools/benchmarking_eventing/go.mod

@@ -5,16 +5,15 @@ go 1.21
 require (
 	github.com/cloudevents/sdk-go/v2 v2.10.1
 	github.com/containerd/containerd v1.6.12
-	github.com/golang/protobuf v1.5.2
+	github.com/golang/protobuf v1.5.3
 	github.com/sirupsen/logrus v1.9.0
 	github.com/stretchr/testify v1.7.1
-	google.golang.org/grpc v1.48.0
-	google.golang.org/protobuf v1.28.0
+	google.golang.org/grpc v1.56.3
+	google.golang.org/protobuf v1.30.0
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/google/go-cmp v0.5.7 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
@@ -24,9 +23,9 @@ require (
 	go.uber.org/goleak v1.1.12 // indirect
 	go.uber.org/multierr v1.8.0 // indirect
 	go.uber.org/zap v1.21.0 // indirect
-	golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
-	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
-	golang.org/x/text v0.3.7 // indirect
-	google.golang.org/genproto v0.0.0-20220722212130-b98a9ff5e252 // indirect
+	golang.org/x/net v0.9.0 // indirect
+	golang.org/x/sys v0.7.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )