Fix

Author: co63oc

paddle/phi/ops/yaml/inconsistent/static_backward.yaml

@@ -96,7 +96,7 @@
   backward : batch_norm_double_grad
 
 - backward_op : c_concat_grad
-  forward : c_concat(Tensor x, int rank = 0, int nranks = 1, int ring_id = 0, bool use_calc_stream = false, bool use_model_parallel = true)
+  forward : c_concat(Tensor x, int rank = 0, int nranks = 1, int ring_id = 0, bool use_calc_stream = false, bool use_model_parallel = true) -> Tensor(out)
   args : (Tensor out_grad, int rank = 0, int nranks = 1, int ring_id = 0, bool use_calc_stream = false, bool use_model_parallel = true)
   output : Tensor(x_grad)
   invoke : c_split(out_grad, rank, nranks, ring_id, use_calc_stream, use_model_parallel)