Update AI Changelog

AI_CHANGELOG.md

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 # AI CHANGELOG
+## [Updated response handling and test questions in langchain-streamlit-demo](https://github.com/fsal/streamlit-hf/commit/5bece5a4841ad9f7e697055aac3d66719c39b528)
+Sun Mar 10 23:05:46 2024 +0100
+- The commit includes changes in the app.py and defaults.py files of the langchain-streamlit-demo project. In app.py, the type of 'full_response' was expanded to include dictionary and the number of source documents displayed was increased from 3 to all. Each source is now also enumerated. In defaults.py, a typo in one of the test questions was corrected.
 ## [Refactored Streamlit app for document chat feature](https://github.com/fsal/streamlit-hf/commit/b85d32f57e72fbdc6d8f47c1d1a3f53614a4feb1)
 Sun Feb 18 00:09:47 2024 +0100
 - This commit includes several changes to the document chat feature of the Streamlit app. The 'StreamlitCallbackHandler' import was commented out and replaced with a 'get_runnable' function to create the chat chain. The error message when no PDF is uploaded was changed from an error to a warning. A spinner was added to indicate when the application is 'thinking', and the response time is now displayed. The sources of the response are now stored in the session state and displayed in an expandable section. The 'chain' is now created with the 'get_runnable' function instead of 'get_agent'.