Bump pydantic from 1.8.2 to 1.10.13 in /backend

Bumps [pydantic](https://github.com/pydantic/pydantic) from 1.8.2 to 1.10.13.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v1.8.2...v1.10.13)

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

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

backend/requirements.txt

@@ -2,7 +2,7 @@ AkvoResponseGrouper==1.3.3a0
 alembic==1.6.5
 fastapi==0.67.0
 FastAPI-SQLAlchemy==0.2.1
-pydantic==1.8.2
+pydantic==1.10.13
 psycopg2-binary==2.9.1
 uvicorn==0.14.0
 fastapi-auth0==0.2.1