Bump google.golang.org/grpc from 1.53.0 to 1.56.3 in /http2/go-grpc

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.53.0 to 1.56.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.53.0...v1.56.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

http2/go-grpc/go.mod

@@ -3,14 +3,14 @@ module github.com/SAP-samples/cf-routing-samples/go-grpc
 go 1.17
 
 require (
-	google.golang.org/grpc v1.53.0
-	google.golang.org/protobuf v1.28.1
+	google.golang.org/grpc v1.56.3
+	google.golang.org/protobuf v1.30.0
 )
 
 require (
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
 	golang.org/x/net v0.17.0 // indirect
 	golang.org/x/sys v0.13.0 // indirect
 	golang.org/x/text v0.13.0 // indirect
-	google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
+	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
 )