1.5.0
move around examples for better structure.
MNT add isort to ruff's rules (#26649)
DOC replace pandas with Polars in examples/gaussian_process/plot_gpr_co2.py (#28804)
DOC add cross-reference to examples instead of duplicating content for GPR (#20003)
MNT Update black to stable version (#22474)
DOC fix title underline too short in Gaussian Process kernel (#24726)