latte-dock: 0.7.4 -> 0.7.5 (#39418)

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/6nvkkskm7j4ngqfy722ajp289gqhg1a9-latte-dock-0.7.5/bin/latte-dock -h’ got 0 exit code
- ran ‘/nix/store/6nvkkskm7j4ngqfy722ajp289gqhg1a9-latte-dock-0.7.5/bin/latte-dock --help’ got 0 exit code
- found 0.7.5 with grep in /nix/store/6nvkkskm7j4ngqfy722ajp289gqhg1a9-latte-dock-0.7.5
- directory tree listing: https://gist.github.com/8f58b4f85d4c80752b6d66e912ce92c0