chore(deps): Bump fastapi from 0.115.6 to 0.115.12

Bumps [fastapi](https://github.com/fastapi/fastapi) from 0.115.6 to 0.115.12.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](https://github.com/fastapi/fastapi/compare/0.115.6...0.115.12)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.115.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -25,7 +25,7 @@ hysteria2-api==0.1.2
 # webpanel
 annotated-types==0.7.0
 anyio==4.8.0
-fastapi==0.115.6
+fastapi==0.115.12
 h11==0.16.0
 itsdangerous==2.2.0
 Jinja2==3.1.6