Update worker.go

[netqyq]

chore: Typo. Ack operation should be an the end of loop.

How to reproduction the problem

go run worker.go
go run worker.go

then run :

go run new_task.go hello world.....

this message will be send to one of the worker, if normal, it wait 5 seconds in the worker, but we press Ctrl+C stop it before 5 seconds. the message will lost in current worker, it should be send to another worker immediately, But it won't be like this.

after change move ack to the end of loop, it works.

after all, we should send ack after the job was done.

[michaelklishin]

Thanks. This tutorial does not focus on acknowledgements or error handling but it's not a bad idea to ack at the very end. Please update the website copy on the live branch.