[`airflow`] Convert `DatasetOrTimeSchedule(datasets=...)` to `AssetOrTimeSchedule(assets=...)` (`AIR311`) (#20202)
<!--
Thank you for contributing to Ruff/ty! To help us out with reviewing,
please consider the following:
- Does this pull request include a summary of the change? (See below.)
- Does this pull request include a descriptive title? (Please prefix
with `[ty]` for ty pull
requests.)
- Does this pull request include references to any relevant issues?
-->
## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
update the argument `datasets` as `assets`
## Test Plan
<!-- How was it tested? -->
update fixture accordingly
ruff
5d7c17c2 - [`airflow`] Convert `DatasetOrTimeSchedule(datasets=...)` to `AssetOrTimeSchedule(assets=...)` (`AIR311`) (#20202)
