update content_summary in chunking

app/law_document_chunker.py

@@ -201,7 +201,7 @@ class LawDocumentChunker:
 
     async def _create_context_summary_with_llm(self, content: str, metadata: ChunkMetadata) -> str:
         """
-        Tạo context_summary bằng LLM theo format: "Structure: LEVEL | Chủ đề: Semantic: SUMMARY"
+        Tạo context_summary bằng LLM theo format: "Structure: LEVEL | Semantic: SUMMARY"
         """
         try:
             # Tạo LEVEL từ metadata