fix document of index_select (#50168)

python/paddle/tensor/search.py

@@ -292,7 +292,7 @@ def index_select(x, index, axis=0, name=None):
     size as the length of ``index``; other dimensions have the same size as in the ``x`` tensor.
 
     Args:
-        x (Tensor): The input Tensor to be operated. The data of ``x`` can be one of float32, float64, int32, int64.
+        x (Tensor): The input Tensor to be operated. The data of ``x`` can be one of float16, float32, float64, int32, int64.
         index (Tensor): The 1-D Tensor containing the indices to index. The data type of ``index`` must be int32 or int64.
         axis (int, optional): The dimension in which we index. Default: if None, the ``axis`` is 0.
         name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None.