chore(deps): bump starlette from 0.37.2 to 0.40.0 in /local/iam-mock

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>

local/iam-mock/requirements.txt

@@ -27,7 +27,7 @@ python-dotenv==1.0.1
 python-multipart==0.0.7
 PyYAML==6.0.1
 sniffio==1.3.0
-starlette==0.37.2
+starlette==0.40.0
 typing_extensions==4.9.0
 ujson==5.9.0
 uvicorn==0.27.0