Incorrect program update tutorial using the CLI

[Mohammed JBILOU]

When following the tutorial to create a program, the following command is given to update the content of an existing command here:

aleph update $HASH ./folder

This will actually create a new store message with the content of ./folder, but won't update the deployed program.
I believe this is caused by the aleph-client setting the allow_amend property to false on upload.