Fix ListenBrainz submission with libsoup 3.0
In the migration to libsoup 3.0 the ListenBrainz submission request got forgotten. This updates the request for libsoup API changes.
Fixes #2966 (closed)
In the migration to libsoup 3.0 the ListenBrainz submission request got forgotten. This updates the request for libsoup API changes.
Fixes #2966 (closed)