Don't forget to escape in windows

### ❌ Incorrect
If you run this:
```shell
grpcurl -d '{"name": "Go"}' -plaintext localhost:50051 helloworld.Greeter.SayHello
```

You will get the result:
```shell
Too many arguments.
Try 'grpcurl -help' for more details.
```

### ✔ Correct
The correct usage is this:
```shell
grpcurl -d "{\"name\":\"Go\"}" -plaintext localhost:50051 helloworld.Greeter.SayHello
```
You can get the expected result:
```shell
{
"message": "Hello Go"
}
```