[Tech] Bump prefect from 1.3.0 to 2.19.6 in /datascience

Bumps [prefect](https://github.com/PrefectHQ/prefect) from 1.3.0 to 2.19.6.
- [Release notes](https://github.com/PrefectHQ/prefect/releases)
- [Changelog](https://github.com/PrefectHQ/prefect/blob/2.19.6/RELEASE-NOTES.md)
- [Commits](PrefectHQ/prefect@1.3.0...2.19.6)

---
updated-dependencies:
- dependency-name: prefect
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>