Update AccessKit to 0.21.2

[bruvzg]

Fixes #111028

[akien-mga]

Would it be worth backporting the update to 4.6 to fix #111028 in 4.6.2?

[bruvzg]

Would it be worth backporting the update to 4.6 to fix #111028 in 4.6.2?

Yes, but it will need changes for previous updates, since API was changed. I'll check it on a weekend.

[Repiteo]

Thanks!

[bruvzg]

Would it be worth backporting the update to 4.6 to fix #111028 in 4.6.2?

I made #117433 (will fully test on all platforms on Monday), but crash is not fully fixed, so it might be enough to only cherry-pick #117322 (fixes regression from #115565 which is already cherry-picked).