Bump starlette from 0.36.3 to 0.40.0 in /containers/fhir-converter

Bumps [starlette](https:/encode/starlette) from 0.36.3 to 0.40.0.
- [Release notes](https:/encode/starlette/releases)
- [Changelog](https:/encode/starlette/blob/master/docs/release-notes.md)
- [Commits](encode/starlette@0.36.3...0.40.0)

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

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

containers/fhir-converter/requirements.txt

@@ -28,7 +28,7 @@ PyYAML==6.0.1
 requests==2.32.2
 six==1.16.0
 sniffio==1.2.0
-starlette==0.36.3
+starlette==0.40.0
 syrupy==4.6.1
 testcontainers[compose]==4.8.1
 tomli==2.0.1