1.2.1
FIX `cross_validate` with multimetric scoring returns the non-failed scorers results even if some fail (#23101)
FEA add LearningCurveDisplay to show plot learning curve (#24084)
FIX propagate configuration to workers in parallel (#25363)
FIX Add NaN handling to selection of best parameters for `HalvingGridSearchCV` (#24539)
DOC Improve format in docstring code examples of splitters (#24475)