Bump streamlit from 1.39.0 to 1.40.2 (#72)

Bumps [streamlit](https://github.com/streamlit/streamlit) from 1.39.0 to 1.40.2.
- [Release notes](https://github.com/streamlit/streamlit/releases)
- [Commits](streamlit/streamlit@1.39.0...1.40.2)

---
updated-dependencies:
- dependency-name: streamlit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -4,5 +4,5 @@ langchain-community==0.3.8
 langchain-openai==0.2.5
 langsmith==0.1.139
 python-dotenv==1.0.1
-streamlit==1.39.0
+streamlit==1.40.2
 tqdm==4.66.6