build(deps-dev): bump fastapi from 0.115.5 to 0.115.6 (#1412)

Bumps [fastapi](https://github.com/fastapi/fastapi) from 0.115.5 to 0.115.6.
- [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:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

poetry.lock

@@ -89,7 +89,7 @@ pytest = ">=7.4.4,<9.0.0"
 pytest-cov = ">=4,<6"
 codecov = "^2.1.13"
 pytest-asyncio = ">=0.21,<0.24"
-fastapi = ">=0.109.1,<0.115.6"
+fastapi = ">=0.109.1,<0.115.7"
 
 black = "^24.1.0"
 ruff = ">=0.5.1,<0.5.2"