DOC simplify ToFloat import example - #2212

Hi, thank you for reviewing.

I checked the failing CI jobs. Both Run pre-commit checks and Check if .pyi file differs from generated one seem to fail while resolving dependencies for the ci-nightly-deps environment on macOS, before running the actual checks.

The error mentions that scikit-learn>=1.4.2 cannot be resolved from the configured indexes.

Since this PR only updates one docstring import example from a private module to the public API, I think the CI failure may be unrelated to this change. Please let me know if there is anything I should update from my side.

Thank you for this contribution @Khadija-de ! indeed there seems to be a temporary failure with the package index from which the CI installs some packages for some of the jobs, it is unrelated to your change and affects other Pull Requests as well. We will re-run the CI job once it is resolved

All good! The CI is running.