anki: 2.0.51 -> 2.0.52 (#41582)

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/anki/versions.

These checks were done:

- built on NixOS
- /nix/store/2dqw72sffcynzzgcfk0k9mh7jn8sw0kw-anki-2.0.52/bin/anki passed the binary check.
- /nix/store/2dqw72sffcynzzgcfk0k9mh7jn8sw0kw-anki-2.0.52/bin/..anki-wrapped-wrapped passed the binary check.
- /nix/store/2dqw72sffcynzzgcfk0k9mh7jn8sw0kw-anki-2.0.52/bin/.anki-wrapped passed the binary check.
- 3 of 3 passed binary check by having a zero exit code.
- 3 of 3 passed binary check by having the new version present in output.
- found 2.0.52 with grep in /nix/store/2dqw72sffcynzzgcfk0k9mh7jn8sw0kw-anki-2.0.52
- directory tree listing: https://gist.github.com/1a53026ee3eea78708113c1b6e9d857f
- du listing: https://gist.github.com/c8dcabda5b46155a959b86843ee24ddd