[Tails-dev] 11.0.15 release candidate builds

We will be releasing 11.0.15 relatively soon. Unsigned candidate builds can be found here:

- https://tb-build-04.torproject.org/~richard/builds/tor-browser/release/unsigned/11.0.15-build1/

The only change is updating the tor daemon to 0.4.7.8 (see
https://forum.torproject.net/t/stable-release-0-4-7-8/3679 )

best,
-Richard