最新代码错误更正

[SeeeeShiwei]

1. 测试指标时，1273个样本出现 UnboundLocalError: local variable 'merged_results' referenced before assignment

• File "OmniDocBench/utils/match_quick.py", line 458, in match_gt2pred_quick
  merged_results.remove(entry)
  UnboundLocalError: local variable 'merged_results' referenced before assignment

2. readme中 dolphin串行了，rowspan需要更正

[ouyanglinke]

非常感谢，已全部修正。