[Doc]: https://learn.microsoft.com/powershell/module/az.dns/new-azdnsrecordconfig MX record example incorrect

### Description

is
### Example 4: Create a RecordSet of type MX
```powershell
$Records = @()
$Records += New-AzDnsRecordConfig -Exchange "mail.microsoft.com" -Preference 5
$RecordSet = New-AzDnsRecordSet -Name "www" -RecordType AAAA -ResourceGroupName "MyResourceGroup" -TTL 3600 -ZoneName "myzone.com" -DnsRecords $Records
```

should probably be:
### Example 4: Create a RecordSet of type MX
```powershell
$Records = @()
$Records += New-AzDnsRecordConfig -Exchange "mail.microsoft.com" -Preference 5
$RecordSet = New-AzDnsRecordSet -Name "@" -RecordType MX -ResourceGroupName "MyResourceGroup" -TTL 3600 -ZoneName "myzone.com" -DnsRecords $Records
```
I could be wrong don't trust me but I was looking for guidance on usage.