Bump simple-icons from 1.9.3 to 1.9.4 (#2148)

Bumps [simple-icons](https://github.com/simple-icons/simple-icons) from 1.9.3 to 1.9.4.
- [Release notes](https://github.com/simple-icons/simple-icons/releases)
- [Commits](https://github.com/simple-icons/simple-icons/commits

)

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