!49901 update ctcloss and unfold doc

Merge pull request !49901 from baihuawei/code_docs_ctcloss_and_undold

mindspore/python/mindspore/nn/loss/loss.py

@@ -2363,7 +2363,7 @@ class CTCLoss(LossBase):
         >>> ctc_loss = CTCLoss(blank=0, reduction='none', zero_infinity=False)
         >>> loss = ctc_loss(ms_input, target, input_lengths, target_lengths)
         >>> print(loss)
-        [-25.794968]
+        -25.794968
     """
 
     def __init__(self, blank=0, reduction='mean', zero_infinity=False):

mindspore/python/mindspore/ops/function/array_func.py

@@ -6013,7 +6013,7 @@ def unfold(input, kernel_size, dilation=1, padding=0, stride=1):
         ValueError: If `padding` value is less than zero.
 
     Supported Platforms:
-        ``Ascend`` ``CPU``
+        ``Ascend`` ``GPU`` ``CPU``
 
     Examples:
         >>> x = Tensor(np.random.rand(4, 4, 32, 32), mindspore.float64)