update hybrid_retriever_tool

tools/hybrid_retriever_tool.py

@@ -110,7 +110,7 @@ class HybridRetrieverTool(RagTool):
                     ],
                     temperature=0
                 )
-                    content = response.choices[0].message.conten.strip()
+                    content = response.choices[0].message.content.strip()
                     try:
                         ranked = json.loads(response.choices[0].message.content)
                         # Keep only valid strings