Update isort requirement from <6 to <7

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@0.0.9...6.1.0)

---
updated-dependencies:
- dependency-name: isort
  dependency-version: 6.1.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -83,7 +83,7 @@ wireviz-web = "wireviz_web.cli:run"
 dev = [
     "poethepoet<1",
     "black<25",
-    "isort<6",
+    "isort<7",
     "pytest<9",
     "pytest-flask<2",
     "filetype<2",