Fix: KG search issue. (#7186)

### What problem does this PR solve?

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

graphrag/search.py

                comm_topn: int = 1,
                ent_sim_threshold: float = 0.3,
                rel_sim_threshold: float = 0.3,
+                  **kwargs
                ):
         qst = question
         filters = self.get_filters({"kb_ids": kb_ids})