build(deps): update fastapi requirement from ~=0.114.2 to ~=0.115.0

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@0.114.2...0.115.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -9,5 +9,5 @@ sentencepiece~=0.2.0
 setuptools~=74.1.2
 huggingface-hub~=0.25.0
 transformers~=4.44.2
-fastapi~=0.114.2
+fastapi~=0.115.0
 uvicorn~=0.30.6