chore(doc): fix typo
chore(doc): fix typo

Closes #39128
https://github.com/dart-lang/sdk/pull/39128

GitOrigin-RevId: f03a58d8dd0a486021eb0d5e51e01383cef48f6e
Change-Id: Iedc2caca99963b26c73b43f65e32be59e750bca7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/123061
Reviewed-by: Michael Thomsen <5977a55c75bb4612004451a56b0b4c22d9d3311d@google.com>

dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk