Bump isort from 5.9.3 to 5.10.0

Bumps [isort](https://github.com/pycqa/isort) from 5.9.3 to 5.10.0.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@5.9.3...5.10.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -3,6 +3,6 @@ Wagtail>=2.8
 bandit==1.7.0
 black==21.10b0
 flake8==4.0.1
-isort==5.9.3
+isort==5.10.0
 msgcheck==3.1
 pydocstyle==6.1.1