poppler_data: 0.4.8 -> 0.4.9

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

This update was made based on information from https://repology.org/metapackage/poppler-data/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 0.4.9 with grep in /nix/store/vcpqkfixqx9gdd3mf07lqil5q7kivlfm-poppler-data-0.4.9
- directory tree listing: https://gist.github.com/582309ee358dd7c8e622f5b89fdf8f88