chore(deps): update uvicorn requirement from >=0.27.0 to >=0.47.0

Updates the requirements on [uvicorn](https://github.com/Kludex/uvicorn) to permit the latest version.
- [Release notes](https://github.com/Kludex/uvicorn/releases)
- [Changelog](https://github.com/Kludex/uvicorn/blob/main/docs/release-notes.md)
- [Commits](https://github.com/Kludex/uvicorn/compare/0.27.0...0.47.0)

---
updated-dependencies:
- dependency-name: uvicorn
  dependency-version: 0.47.0
  dependency-type: direct:production
...

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

api/requirements.txt

@@ -1,6 +1,6 @@
 # Runtime dependencies for ferro-ta API
 ferro_ta>=1.0.0
 fastapi>=0.110.0
-uvicorn[standard]>=0.27.0
+uvicorn[standard]>=0.47.0
 pydantic>=2.0.0
 numpy>=1.20