docs: fix incorrect example for AMQP

[jonaslagoni]

According to the JSON Schema files, you are only allowed to use exchange or queue depending on the is: https://github.com/asyncapi/spec-json-schemas/blob/287ed2846a764ac6ffce1d5034a9e3e47853a247/bindings/amqp/0.3.0/channel.json#L84

You cannot have both, which makes the example invalid.

[Tenischev]

@jonaslagoni actually, having both makes sense and I would say that the description is wrong, not the example

[jonaslagoni]

@Tenischev might be, I have no idea 😄 I would definitely do a new issue discussing this.

This PR just fixes the example based on the current version of AMQP and whats valid 🙂

[GreenRover]

I not 100% familiar with amqp but the change makes sense for me.

[jonaslagoni]

Thanks for the review @GreenRover ✌️

[jonaslagoni]

/rtm

[g-radam]

Is someone able to elaborate how you would declare an AMQP channel queue binding, where that queue is bound to an exchange (in the RabbitMQ sense)? See: RabbitMQ Queue Binding.

I interpreted the original example:

channels:
  userSignup:
    address: 'user/signup'
    bindings:
      amqp:
        is: queue
        queue:
          name: my-queue-name
          durable: true
          exclusive: true
          autoDelete: false
          vhost: /
        exchange:
          name: my-service-exchange
        bindingVersion: 0.3.0

to mean the channel declares a queue called "user/signup" which operations will use, and that queue was bound to an exchange of my choice (IE receive messages from that exchange). Unless my interpretation of this is wrong, how else would you declare that the channel queue is bound to a custom exchange??

I would have said the amqp schema is wrong, not the example. Am I missing something here?