Revert "win-wasapi: Remove 'BETA' from Application Audio Capture name"

This reverts commit 36ea03dfa67f099aa63b65a9695aeaf98824f88d.

plugins/win-wasapi/data/locale/en-US.ini

@@ -1,6 +1,6 @@
 AudioInput="Audio Input Capture"
 AudioOutput="Audio Output Capture"
-ApplicationAudioCapture="Application Audio Capture"
+ApplicationAudioCapture="Application Audio Capture (BETA)"
 Device="Device"
 Default="Default"
 UseDeviceTiming="Use Device Timestamps"