xmrig: 2.5.2 -> 2.5.3

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

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

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 2.5.3 with grep in /nix/store/csidwxna34qv298smf6sflwaj93xr9p0-xmrig-2.5.3
- directory tree listing: https://gist.github.com/5aaeee0849eb7acb740cae01310a19f9