Bump fastapi from 0.115.2 to 0.115.3

Bumps [fastapi](https://github.com/fastapi/fastapi) from 0.115.2 to 0.115.3.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.115.2...0.115.3)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 couchbase==4.3.2
-fastapi==0.115.2
+fastapi==0.115.3
 httpx==0.27.2
 pydantic==2.9.2
 pydantic_settings==2.6.0