chore(deps): update dependency isort to v6

Author: renovate[bot]

requirements-lint.txt

@@ -3,7 +3,7 @@ argcomplete==2.0.0
 black==25.1.0
 commitizen==4.1.1
 flake8==7.1.1
-isort==5.13.2
+isort==6.0.0
 mypy==1.14.1
 pylint==3.3.4
 pytest==8.3.4