argparse docs: "optional arguments" instead of "options"

[jwilk]

Docs for ArgumentParser.add_argument_group say:

By default, ArgumentParser groups command-line arguments into “positional arguments” and “optional arguments” when displaying help messages.

But "optional arguments" was renamed to just "options" in Python 3.10 (#53903).

Linked PRs

• gh-99650 : Updated argparse docs #99653
• [3.11] gh-99650 : Updated argparse docs (GH-99653) #99705