build(deps): bump fastapi in /examples/python/fastapi/postgres

Bumps [fastapi](https://github.com/tiangolo/fastapi) from 0.83.0 to 0.109.1.
- [Release notes](https://github.com/tiangolo/fastapi/releases)
- [Commits](fastapi/fastapi@0.83.0...0.109.1)

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

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

Author: dependabot[bot]

examples/python/fastapi/postgres/requirements.txt

@@ -1,3 +1,3 @@
-fastapi===0.83.0; python_version >= "3.6"
+fastapi===0.109.1; python_version >= "3.6"
 uvicorn==0.18.3
 psycopg2-binary==2.9.3