Fix order of inputs in infer() of label_semantic example (new API) (!10993) · 合并请求 · PaddlePaddle / Paddle

Fix order of inputs in infer() of label_semantic example (new API) !10993

Created by: sidgoyal78

This is a minor fix to avoid inconsistency related to the feed_order in train and infer methods of the label_semantic_roles example.