docs: fix MenuItem windowMenu role description

[sindresorhus]

The behavior was changed in #15930

Notes: Fixed MenuItem windowMenu role description to account for changing of Close to Zoom.

[welcome]

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[codebytere]

ty!

[release-clerk]

Release Notes Persisted

Fixed MenuItem windowMenu role description to account for changing of Close to Zoom.

[trop]

I have automatically backported this PR to "5-0-x", please check out #17118