Bump isort from 5.12.0 to 5.13.2 in /server

Bumps [isort](https://github.com/pycqa/isort) from 5.12.0 to 5.13.2.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@5.12.0...5.13.2)

---
updated-dependencies:
- dependency-name: isort
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

server/requirements.txt

@@ -43,7 +43,7 @@ uvicorn[standard]==0.23.2
 # dev
 daphne==4.0.*
 black==23.7
-isort==5.12.0
+isort==5.13.2
 flake8==6.1.0
 pytest==7.4.4
 pytest-django==4.5.2