USB-Audio: Changed GoXLR 'Stream Mix' channel names to match the latest Windows release

[GitHub pull_request - edited <github@xxxxxxxxxxxxxxxx>]

alsa-project/alsa-ucm-conf pull request #572 was edited from FrostyCoolSlug:

This change is to match the Broadcast Mix channel names to the latest release of the GoXLR App on Windows.

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/572
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/572.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf