fix: update output directory for Whisper model

- Changed the output directory for the Whisper model from OUTPUT_BASE_DIR to PREPARED_BASE_DIR to ensure proper model storage.

apps/audio_cloning/vallex/main.py

@@ -163,7 +163,7 @@ audio_tokenizer = AudioTokenizer(device)
 vocos = Vocos.from_pretrained("charactr/vocos-encodec-24khz").to(device)
 
 # initialize ASR model
-OUTPUT_DIR_WHISPER = os.path.join(OUTPUT_BASE_DIR, "models/whisper")
+OUTPUT_DIR_WHISPER = os.path.join(PREPARED_BASE_DIR, "models/whisper")
 if not os.path.exists(OUTPUT_DIR_WHISPER):
     os.makedirs(OUTPUT_DIR_WHISPER, exist_ok=True)