readme.md suggestion #2

[murilo-cerone]

@edsenabr

"Each backend services returns a 'Hello World' message(,) informing its IP address and Availability Zone within AWS Cloud. The frontend UI makes repetitive and infinite requests to those backend services, writing down their responses and plotting on a map the path each request took:“

Sugestão:
"Each backend services returns a 'Hello World' message informing its IP address and its Availability Zone (AZ). The frontend UI keeps making requests to the backend services, writing down their responses and plotting on a map the path each request took.“

[edsenabr]

changed.