Bump starlette from 0.37.2 to 0.40.0 in /Oracle-23ai-RAG-Chatbot

Bumps [starlette](https://github.com/encode/starlette) from 0.37.2 to 0.40.0.
- [Release notes](https://github.com/encode/starlette/releases)
- [Changelog](https://github.com/encode/starlette/blob/master/docs/release-notes.md)
- [Commits](encode/starlette@0.37.2...0.40.0)

---
updated-dependencies:
- dependency-name: starlette
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Oracle-23ai-RAG-Chatbot/requirements.txt

@@ -202,7 +202,7 @@ sortedcontainers==2.4.0
 soupsieve==2.5
 SQLAlchemy==2.0.28
 stack-data==0.6.3
-starlette==0.37.2
+starlette==0.40.0
 strawberry-graphql==0.208.2
 streamlit==1.32.2
 striprtf==0.0.26