Merge pull request #5835 from open-webui/dependabot/pip/backend/dev/pydantic-2.9.2

chore(deps): bump pydantic from 2.8.2 to 2.9.2 in /backend

backend/requirements.txt

@@ -1,6 +1,6 @@
 fastapi==0.111.0
 uvicorn[standard]==0.30.6
-pydantic==2.8.2
+pydantic==2.9.2
 python-multipart==0.0.9
 
 Flask==3.0.3