build(deps-dev): bump the npm-dependencies group with 2 updates

Bumps the npm-dependencies group with 2 updates: [@iconify-json/simple-icons](https://github.com/iconify/icon-sets) and [postcss](https://github.com/postcss/postcss).


Updates `@iconify-json/simple-icons` from 1.2.79 to 1.2.80
- [Commits](https://github.com/iconify/icon-sets/commits)

Updates `postcss` from 8.5.10 to 8.5.12
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.10...8.5.12)

---
updated-dependencies:
- dependency-name: "@iconify-json/simple-icons"
  dependency-version: 1.2.80
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
- dependency-name: postcss
  dependency-version: 8.5.12
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]