fix: correct argument limit error (#2758)

Signed-off-by: Emmanuel Ferdman <emmanuelferdman@gmail.com>

Author: emmanuel-ferdman

packages/dbgpt-core/src/dbgpt/rag/transformer/llm_extractor.py

@@ -56,7 +56,7 @@ async def _extract(
         """Inner extract by LLM."""
         # limit check
         if limit and limit < 1:
-            ValueError("optional argument limit >= 1")
+            raise ValueError("optional argument limit >= 1")
 
         template = HumanPromptTemplate.from_template(self._prompt_template)