build(deps): bump slang from 73b79be to a4d08eb

Bumps [slang](https://github.com/MikePopoloski/slang) from `73b79be` to `a4d08eb`.
- [Release notes](https://github.com/MikePopoloski/slang/releases)
- [Commits](MikePopoloski/slang@73b79be...a4d08eb)

---
updated-dependencies:
- dependency-name: slang
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>