Update ChatQnA/README.md

Co-authored-by: Eero Tamminen <[email protected]>

Author: louie-tsai

ChatQnA/README.md

@@ -366,6 +366,6 @@ Here is a screenshot for one tracing of TGI serving request.
 There are also OPEA related tracings. Users could understand the time breakdown of each service request by looking into each opea:schedule operation.
 ![image](https://github.com/user-attachments/assets/6137068b-b374-4ff8-b345-993343c0c25f)
 
-There might be asyn function such as llm/MicroService_asyn_generate and users need to check the tracing of the asyn function in another operation like
+There could be async function such as `llm/MicroService_asyn_generate` and user needs to check the trace of the async function in another operation like
 opea:llm_generate_stream.
 ![image](https://github.com/user-attachments/assets/a973d283-198f-4ce2-a7eb-58515b77503e)