Fix typo
Fix typo

I believe it should be `dart_tool`

Closes #39328
https://github.com/dart-lang/sdk/pull/39328

GitOrigin-RevId: 057e2fd1b72e50894d09c774f15026c9ca4e89a5
Change-Id: I90054ce5ecc8c1b75a25a518d685575d17016ec2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/124720
Reviewed-by: Michael Thomsen <5977a55c75bb4612004451a56b0b4c22d9d3311d@google.com>

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