Bump starlette from 0.39.2 to 0.40.0

Bumps [starlette](https://github.com/encode/starlette) from 0.39.2 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](Kludex/starlette@0.39.2...0.40.0)

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

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

Author: dependabot[bot]

poetry.lock

@@ -32,7 +32,7 @@ typing-extensions = { python = "<3.12", version = "^4.9.0" }
 [tool.poetry.group.dev.dependencies]
 pytest = ">=7.1,<9.0"
 pytest-asyncio = ">=0.23.3,<0.25.0"
-starlette = ">=0.38.2,<0.40.0"
+starlette = ">=0.38.2,<0.41.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]