harfbuzz-icu: 1.7.6 -> 1.8.0

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

This update was made based on information from https://repology.org/metapackage/harfbuzz-icu/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 1.8.0 with grep in /nix/store/pmvppvi868g4ibbvs9gjwi3ph762g3jr-harfbuzz-icu-1.8.0
- directory tree listing: https://gist.github.com/bb27570dfb82354e8c73dae012fd6813
- du listing: https://gist.github.com/091761781e243362ba103066c2496295