Update isort requirement from ~=4.3.4 to ~=5.10.1

Updates the requirements on [isort](https://github.com/pycqa/isort) to permit the latest version.
- [Release notes](https://github.com/pycqa/isort/releases)
- [Changelog](https://github.com/PyCQA/isort/blob/main/CHANGELOG.md)
- [Commits](PyCQA/isort@4.3.4...5.10.1)

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

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

Author: dependabot[bot]

requirements.txt

@@ -9,7 +9,7 @@ Flask-Gzip~=0.2
 Flask-pyoidc~=1.3.0
 Flask-SQLAlchemy~=2.3.2
 gunicorn~=19.7.1
-isort~=4.3.4
+isort~=5.10.1
 itsdangerous~=0.24
 Jinja2~=2.10
 lazy-object-proxy~=1.4.0