Update AI Changelog

AI_CHANGELOG.md

@@ -1,4 +1,22 @@
 # AI CHANGELOG
+## [Refactor and update the language model and Azure settings](https://github.com/fsal/streamlit-hf/commit/9986d52cd44055dbb02f796180c110ef53d1d7f3)
+Fri Feb 2 11:41:33 2024 +0100
+- 1. Deleted the .env-example file.
+- 2. Updated the copyright holder in the LICENSE file.
+- 3. Updated the langchain-streamlit-demo/app.py file, which includes several changes:
+- Refactored the import statements.
+- Removed the Azure settings and commented out the related code.
+- Increased the maximum value for the 'Number of Chunks' slider.
+- Disabled the LangSmith API Key input field.
+- 4. Updated the langchain-streamlit-demo/defaults.py file:
+- Added a new model 'gpt-4-turbo-preview' to the MODEL_DICT dictionary.
+- Set the default model to 'gpt-4-turbo-preview'.
+- Commented out the Azure related variables and dictionary.
+- 5. Updated the langchain-streamlit-demo/llm_resources.py file:
+- Set default values for the 'azure_available' and 'azure_dict' parameters in the 'get_llm' function.
+- 6. Updated the requirements.txt file:
+- Added 'langchain-community==0.0.16' to the list of requirements.
+- Commented out 'mypy==1.8.0'.
 ## [Removed version bump workflow and downgraded duckduckgo-search library](https://github.com/fsal/streamlit-hf/commit/6a0b217369f290998d75141d537366f1f0aed0e9)
 Fri Feb 2 10:17:38 2024 +0100
 - Deleted the GitHub action workflow for bumping the version of the project (bumpver.yml).