Bump starlette from 0.36.2 to 0.40.0 in /examples/fastapi-base (#99)

Bumps [starlette](https://github.com/encode/starlette) from 0.36.2 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@0.36.2...0.40.0)

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

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examples/fastapi-base/requirements.txt

@@ -1,5 +1,5 @@
 fastapi==0.109.1
 pydantic==1.10.13
-starlette==0.36.2
+starlette==0.40.0
 typing-extensions==4.2.0
 uvicorn==0.17.6