Update Readme because e2ee folders are now accessible in browser

[alexanderdd]

This https://github.com/nextcloud/end_to_end_encryption/blob/master/README.md

says "it makes sure that End-to-End encrypted files are not accessible with the web interface"
and "E2EE files are inaccessible (by design) from the Nextcloud Web UI (client) in order to minimize needing to trust the server."

which is not true anymore AFAIK?

[wrobelda]

Came here to try to understand what's going on, becasue right now it makes it seem like the e2ee encryption is not enabled at all, despite what the client app suggests.

EDIT: well, nope, I just got bit by the misleading UI/UX suggesting E2EE is enabled for all files synced by default. I do appreciate Nexcloud being open source and such, but god if this isn't a dangerous design that totally throws new users udner a bus.

[wrobelda]

Well, actually, my files aren't encrypted on the storage at all. You need to explicitly enable encryption on each folder for it to work.

I added a PR for desktop client that would hopefully make things a bit cleared for new users: nextcloud/desktop#8165