chore(deps-dev): update isort requirement

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@5.13.2...7.0.0)

---
updated-dependencies:
- dependency-name: isort
  dependency-version: 7.0.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

pyproject.toml

@@ -44,7 +44,7 @@ invoke = "^2.2.0"
 hypothesis = "^6.108"
 tomli = "^2.2.1"
 black = ">=24.1,<26.0"
-isort = "^5.13.2"
+isort = ">=5.13.2,<8.0.0"
 flake8 = "^6.1.0"
 scikit-survival = "^0.24.1"
 pre-commit = "^3.8"