Documentation error

A "y" is missing in the following occurrences:

sudo mkdir /var/lib/heavyai/data/heavai_import/jhub_heavai_dropbox sudo chown 1000 /var/lib/heavyai/data/heavai_import/jhub_heavai_dropbox sudo chmod 750 /var/lib/heavyai/data/heavai_import/jhub_heavai_dropbox

from here: https://docs.heavy.ai/data-science/get-started-jupyter#upgrading-docker-compose-services