dropbox: 38.4.27 -> 40.4.46

Changed files
+1 -1
pkgs
applications
networking
dropbox
+1 -1
pkgs/applications/networking/dropbox/default.nix
···
# Dropbox client to bootstrap installation.
# The client is self-updating, so the actual version may be newer.
let
-
version = "38.4.27";
+
version = "40.4.46";
arch = {
"x86_64-linux" = "x86_64";