Add information about where to download when downloading Tails in Tails

When downloading Tails in Tails (following instructions https://tails.boum.org/upgrade/tails/index.en.html), the default download folder is "Tor Browser", so the file is downloaded in the RAM. It should not work with 2GB of RAM (the system requirements). I had the problem today with 4GB of RAM, Tails finally freeze.

Maybe a warning can be added to suggest to download in the "Persistent" folder if enabled?

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information