updates documentation with region not found error

[MatteoPierro]

Adds information to the Readme in order to solve the region not found error.

[phuonghuynh]

@ronaldtse could you review this update? Pls do Rebase and Merge if its ok

[ronaldtse]

@MatteoPierro thanks for this. @phuonghuynh sorry I missed your message earlier.

This makes me think the correct solution is to allow selection of the region in the interface where we add the queue. For example, you could have a queue in us-east-1 but also another in eu-east-1. We can fetch the region list from AWS API (i.e. which regions support SQS).

What do you think?

[ronaldtse]

@MatteoPierro please feel free to let us know any other problems you encounter with the plugin. Thank you again for your contribution!

[MatteoPierro]

@ronaldtse I agree with you that the correct solution is to allow the region selection in the user interface.

[ronaldtse]

Appreciate your thoughts @MatteoPierro !

[phuonghuynh]

@ronaldtse could we implement this ?

[ronaldtse]

@phuonghuynh please do, thanks!