Inverted bool in type Decoder docs

[JASKevinWhite]

In the doc page for type Decode, located:

https://pkg.go.dev/github.com/openrdap/rdap#Decoder

it says 👍

result, err := d.Decode()

if err != nil {
  if domain, ok := result.(*rdap.Domain); ok {
    fmt.Printf("Domain name = %s\n", domain.LDHName)
  }
}

I know this is just sample code (and thanks for having it there, it is exactly what I needed), but I think the err check is inverted. You want to go into the block and cast the result if the decode didn't have an error...if err == nil.