[BUG] EventHub .NET Sample. Wrong instructions in README

[rido-min]

Following https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/eventhub/Azure.Messaging.EventHubs/samples/Sample01_HelloWorld.md I found missing instructions:

Expected behavior
I can follow and complete the tutorial

Actual behavior (include Exception or Stack Trace)
The sample code does not compile

I fixed by following the next steps.

1. Add main NuGet dotnet add package Azure.Messaging.EventHubs
2. Update AMQP to workaround: Possible incompatibility with .NET 5.0 azure-amqp#165
3. Add dotnet add package System.Memory.Data to be able to use BinaryData
4. Update code to avoid using partitionEvent.Data.EventBody

I update the code from

await foreach (PartitionEvent partitionEvent in consumer.ReadEventsAsync(cancellationSource.Token))
{
    eventDataRead.Add(partitionEvent.Data.EventBody.ToString());
    if (eventDataRead.Count >= maximumEvents)
    {
        break;
    }
}

to:

await foreach (PartitionEvent partitionEvent in consumer.ReadEventsAsync(cancellationSource.Token))
{
    var data = BinaryData.FromBytes(partitionEvent.Data.Body);
    eventDataRead.Add(data.ToString());
                    
    if (eventDataRead.Count >= maximumEvents)
    {
        break;
    }
}

[jsquire]

Hi @rido-min. Thank you for your feedback. Looks like we missed updating the samples README to reference the 5.3.0-beta.4 package. I'll get that patched up.

[jsquire]

Fixed by #17315

[devedse]

@jsquire
This issue also happens on other documentation pages like:
https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/eventhub/Azure.Messaging.EventHubs/samples/Sample05_ReadingEvents.md