chore(format): run black on dev (#591)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

examples/ipynb/example.ipynb

@@ -284,7 +284,7 @@
     "from tools.audio import load_audio\n",
     "\n",
     "sample = chat.sample_audio_speaker(load_audio(\"sample.mp3\", 24000))\n",
-    "print(sample) # save it in order to load the speaker without sample audio next time\n",
+    "print(sample)  # save it in order to load the speaker without sample audio next time\n",
     "\n",
     "params_infer_code = ChatTTS.Chat.InferCodeParams(\n",
     "    sample=sample,\n",

tools/audio/av.py

@@ -38,6 +38,7 @@ def wav2(i: BytesIO, o: BufferedWriter, format: str):
     out.close()
     inp.close()
 
+
 def load_audio(file: str, sr: int) -> np.ndarray:
     if not Path(file).exists():
         raise FileNotFoundError(f"File not found: {file}")