Bump fastapi from 0.115.0 to 0.115.12

Bumps [fastapi](https://github.com/fastapi/fastapi) from 0.115.0 to 0.115.12.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](https://github.com/fastapi/fastapi/compare/0.115.0...0.115.12)

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

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

README.md

@@ -232,7 +232,3 @@ xdg-open htmlcov/index.html
 ## License
 
 This project is licensed under the [Apache-2.0](https://github.com/long2ice/fastapi-cache/blob/master/LICENSE) License.
-
-## Sponsor
-
-[![Powered by DartNode](https://dartnode.com/branding/DN-Open-Source-sm.png)](https://dartnode.com "Powered by DartNode - Free VPS for Open Source")