grml-zsh-config: 0.14.2 -> 0.14.3

Semi-automatic update. 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 0.14.3 in filename of file in /nix/store/2z6cjbqfwc5h5rwz64c3pjd0a008yhp8-grml-zsh-config-0.14.3