Fix typo

Signed-off-by: Jael Gu <mengjia.gu@zilliz.com>

pytorchvideo.py

@@ -38,8 +38,8 @@ class PytorchVideo(NNOperator):
             - mvit_base_32x3
         skip_preprocess (`str`):
             Flag to skip video transforms.
-        classmap (`str=None`):
-            Path of the json file to match class names.
+        classmap (`dict=None`):
+            The dictionary maps classes to integers.
         topk (`int=5`):
             The number of classification labels to be returned (ordered by possibility from high to low).
     """
@@ -49,7 +49,7 @@ class PytorchVideo(NNOperator):
             model_name: str = 'x3d_xs',
             framework: str = 'pytorch',
             skip_preprocess: bool = False,
-            classmap: str = None,
+            classmap: dict = None,
             topk: int = 5,
     ) -> None:
         super().__init__(framework=framework)