krita: 3.3.3 -> 4.0.0 (#37461)

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 4.0.0 with grep in /nix/store/k8xscjzkd9w5n6hly18qcwgg62m3fjh9-krita-4.0.0
- directory tree listing: https://gist.github.com/c2d48bc58cc453eac241620389f2b9ce