Update isort requirement from <5.14,>=5.12 to >=5.12,<6.1 (#982)

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@5.12.0...6.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -13,7 +13,7 @@ description = "A pluggable framework for building codemods in Python"
 dependencies = [
     "boltons>=21.0,<24.2",
     "GitPython<4",
-    "isort>=5.12,<5.14",
+    "isort>=5.12,<6.1",
     "libcst>=1.6,<1.7",
     "packaging>=23.2,<25.0",
     "pydantic~=2.10.1",