[Release notes] Sauna 4.6.0.11

[olf]

@jovirkku

The transfer speed over the Bluetooth link may be slow, often just hundreds of kilobits per second.

Jolla knows why: Bluetooth obex push is using chunks of 666bytes while N9 is using 32K

^{Please fix your old bugs faster than introducing new ones.
@Jolla, i.e. please change your policy on this, otherwise SailfishOS will behave like an “early beta version” forever. Actually the late SailfishOS 2 releases (e.g. 2.2.1) were clearly less buggy, so this is a structural regression for long.}