chore(backend/deps-dev): bump isort in /autogpt_platform/backend

Bumps [isort](https://github.com/PyCQA/isort) from 5.13.2 to 6.0.1.
- [Release notes](https://github.com/PyCQA/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@5.13.2...6.0.1)

---
updated-dependencies:
- dependency-name: isort
  dependency-version: 6.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

autogpt_platform/backend/poetry.lock

@@ -71,7 +71,7 @@ aiohappyeyeballs = "^2.6.1"
 black = "^24.10.0"
 faker = "^33.3.1"
 httpx = "^0.28.1"
-isort = "^5.13.2"
+isort = "^6.0.1"
 poethepoet = "^0.33.1"
 pyright = "^1.1.398"
 pytest-mock = "^3.14.0"