add medium-aishell

model.py

@@ -101,6 +101,7 @@ def get_pretrained_model(name: str) -> sherpa_onnx.OfflineRecognizer:
         "base",
         "small",
         "medium",
+        "medium-aishell",
     ), name
     full_repo_id = "csukuangfj/sherpa-onnx-whisper-" + name
     encoder = _get_nn_model_filename(
@@ -136,4 +137,5 @@ whisper_models = {
     "small": get_pretrained_model,
     "distil-small.en": get_pretrained_model,
     "medium": get_pretrained_model,
+    "medium-aishell": get_pretrained_model,
 }