Add UTF-8 json ouput support while langchain.debug is set to True. (#5802)
Before:
<img width="984" alt="image"
src="https://github.com/hwchase17/langchain/assets/4317474/2b0807b4-a1d6-4df2-87cc-92b1c8e10534">
After:
<img width="992" alt="image"
src="https://github.com/hwchase17/langchain/assets/4317474/128c2c7d-2ed5-4c95-954d-b0964c83526a">
Thanks in advance.
@agola11