Bump pydantic from 2.3.0 to 2.4.0 in /services/auth-service

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](https://github.com/pydantic/pydantic/compare/v2.3.0...v2.4.0)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-type: direct:production
...

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

services/auth-service/pyproject.toml

@@ -10,7 +10,7 @@ authors = ["Declan Teevan <dt@hexolan.com>"]
 [tool.poetry.dependencies]
 python = "^3.9"
 grpcio = "^1.57.0"
-pydantic = "^2.3.0"
+pydantic = "^2.4.0"
 pydantic-settings = "^2.0.3"
 databases = {extras = ["asyncpg"], version = "^0.8.0"}
 grpcio-health-checking = "^1.57.0"