You can actually tell, given the graph they posted.
The four states beneath Poland for 2025 are Lithuania, which slightly decreased from 2024 (though not enough to affect the ranking order), and then Portugal, Romania, and Slovakia, which are all in about the same spot (no visible increase or decrease).
So the factor in terms of it moving up four slots will have been Poland increasing.
Is this Poland actually doing better or are other countries doing worse?
You can actually tell, given the graph they posted.
The four states beneath Poland for 2025 are Lithuania, which slightly decreased from 2024 (though not enough to affect the ranking order), and then Portugal, Romania, and Slovakia, which are all in about the same spot (no visible increase or decrease).
So the factor in terms of it moving up four slots will have been Poland increasing.
Probably the latter. ;(