Bump pydantic-settings from 2.3.1 to 2.3.2 in /backend

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.3.1 to 2.3.2.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.3.1...v2.3.2)

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

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

backend/pyproject.toml

@@ -15,7 +15,7 @@ uvicorn = { version = "^0.30.1", extras = ["standard"] }
 python-jose = { version = "^3.3.0", extras = ["cryptography"] }
 passlib = "^1.7.4"
 python-multipart = "^0.0.9"
-pydantic-settings = "^2.3.1"
+pydantic-settings = "^2.3.2"
 APScheduler = "^3.10.4"
 discord-webhook = "^1.3.1"
 alembic = "^1.13.1"