!12820 Fix: TimeDistributed Bug

From: @dinglongwei
Reviewed-by: @liangchenghui,@c_34
Signed-off-by: @liangchenghui

mindspore/nn/layer/timedistributed.py

@@ -41,7 +41,7 @@ def _check_expand_dims_axis(time_axis, ndim):
 def _generate_perm(axis_a, axis_b, length):
     perm = tuple(range(length))
     axis_a, axis_b = (axis_a, axis_b) if axis_a < axis_b else (axis_b, axis_a)
-    return perm[:axis_a] + perm[axis_a + 1: axis_b + 1] + (perm[axis_a],) + perm[axis_b + 1:]
+    return perm[:axis_a] + (perm[axis_b],) + perm[axis_a: axis_b] + perm[axis_b + 1:]
 
 
 @constexpr