Chore(deps): Update pydantic requirement in /api/app (#23)

Updates the requirements on [pydantic](https://github.com/pydantic/pydantic) to permit the latest version.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.6.1...v2.6.4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

api/app/requirements.txt

@@ -2,7 +2,7 @@ uvicorn~=0.27.1
 ffmpeg-python~=0.2.0
 fastapi~=0.110.0
 SQLAlchemy~=2.0.27
-pydantic~=2.6.1
+pydantic~=2.6.4
 cryptography~=42.0.5
 pydantic-settings~=2.1.0
 PyJWT~=2.8.0