nixos/wyoming/faster-whisper: pass device config to executable

The device could previously be configured but wasn't wired up to do
anything meaningful and as such always defaulted to CPU.

nixos/modules/services/audio/wyoming/faster-whisper.nix

@@ -138,6 +138,7 @@ in
               --data-dir $STATE_DIRECTORY \
               --download-dir $STATE_DIRECTORY \
               --uri ${options.uri} \
+              --device ${options.device} \
               --model ${options.model} \
               --language ${options.language} \
               --beam-size ${options.beamSize} ${options.extraArgs}