Update fastapi requirement from 0.115.5 to 0.115.6

Updates the requirements on [fastapi](https://github.com/fastapi/fastapi) to permit the latest version.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.115.5...0.115.6)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -7,7 +7,7 @@ license = "MIT"
 
 [tool.poetry.dependencies]
 python = "^3.11"
-fastapi = "0.115.5"
+fastapi = "0.115.6"
 uvicorn = "0.32.1"
 
 [tool.poetry.dev-dependencies]