!28748 Fix SoftShrink operator documentation

Merge pull request !28748 from chenweitao_295/SoftShrink_doc_issues

mindspore/python/mindspore/ops/operations/nn_ops.py

@@ -8538,7 +8538,7 @@ class Conv3DTranspose(PrimitiveWithInfer):
 
 class SoftShrink(Primitive):
     r"""
-    Applies the soft shrinkage function element-wise.
+    Applies the SoftShrink function element-wise.
 
     .. math::
         \text{SoftShrink}(x) =
@@ -8549,7 +8549,7 @@ class SoftShrink(Primitive):
         \end{cases}
 
     Args:
-        lambd(Float): the :math:`\lambda` must be no less than zero value for the Softshrink formulation. Default: 0.5.
+        lambd(Float): the :math:`\lambda` must be no less than zero for the SoftShrink formulation. Default: 0.5.
 
     Inputs:
         - **input_x** (Tensor) - The input of SoftShrink with data type of float16 or float32.