Blynk.Air not showing New shipment Button in Free account

@DimitryPB @Seth_MSR the doc is outdated. Updated.

As Free plan has only 2 devices, it doesn’t make sense to allow 25 shipments to be created (like it was before). So with the new deployment the new limit is:

FREE - 2 shipments
PLUS - 10 shipments
PRO - 25 shipments