spice-protocol: 0.12.13 -> 0.12.14 (#41962)

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

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

These checks were done:

- built on NixOS

- 0 of 0 passed binary check by having a zero exit code.
- 0 of 0 passed binary check by having the new version present in output.
- found 0.12.14 with grep in /nix/store/c8d98iaj9smm6k0fkcjnz8x9byb6vb1x-spice-protocol-0.12.14
- directory tree listing: https://gist.github.com/4927fbed4bca5bd3e211633f48595e5f
- du listing: https://gist.github.com/67d9c9cad3d1803064b71e56d68c8a26