add pydocstyle version constraint

[iuhilnehc-ynos]

to fix CI warning which related to ros2/rclcpp#2076. such as:

test/test_pep257.py:22: in test_pep257
    rc = main(argv=[])
../../../../install/ament_pep257/lib/python3.10/site-packages/ament_pep257/main.py:125: in main
    report = generate_pep257_report(args.paths, excludes, args.ignore, args.select,
../../../../install/ament_pep257/lib/python3.10/site-packages/ament_pep257/main.py:190: in generate_pep257_report
    for filename, checked_codes, ignore_decorators in files_to_check:
E   ValueError: too many values to unpack (expected 3)

Signed-off-by: Chen Lihui lihui.chen@sony.com

[iuhilnehc-ynos]

https://github.com/ament/ament_lint/blob/96d9ca4fd32b18a1e083b9e952930c93251be4f4/ament_pep257/ament_pep257/main.py#L185-L190 can't use pydocstyle version that is greater or equal than 6.2.0.

pydocstyle 6.2.2 (used in CI):

https://github.com/PyCQA/pydocstyle/blob/6.2.2/src/pydocstyle/config.py#L312-L315

pydocstyle 6.1.1:

https://github.com/PyCQA/pydocstyle/blob/6.1.1/src/pydocstyle/config.py#L292

[clalancette]

So we already fixed this for Rolling in ament/ament_lint#428 . We should just backport that. I'll close this and kick that off now.