Bump starlette from 0.37.2 to 0.40.0 in the pip group across 1 directory

Bumps the pip group with 1 update in the / directory: [starlette](https://github.com/encode/starlette).


Updates `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
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -4,7 +4,7 @@ pydantic==2.8.2
 python-dotenv==1.0.1
 Requests==2.32.3
 slowapi==0.1.9
-starlette==0.37.2
+starlette==0.40.0
 telnyx==2.1.2
 uvicorn==0.30.0
 watchdog==4.0.1