All-at-once contradicts the official AWS documentation

Hi Paquito and Adam,

It took me a while to figure out what you were referring to but now I know…  For those who find this later, All At Once and Rolling deploys for Elastic Beanstalk use existing instances instead of new instances.  We’ll update with that distinction.

The AWS documentation didn’t use to explain it in that detail and it seems that level of detail in the documentation was added since the video in the course was recorded.

–Scott