build(deps): bump magnus from 0.7.1 to 0.8.2 in /bindings/ruby

Bumps [magnus](https://github.com/matsadler/magnus) from 0.7.1 to 0.8.2.
- [Release notes](https://github.com/matsadler/magnus/releases)
- [Changelog](https://github.com/matsadler/magnus/blob/main/CHANGELOG.md)
- [Commits](matsadler/magnus@0.7.1...0.8.2)

---
updated-dependencies:
- dependency-name: magnus
  dependency-version: 0.8.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

bindings/ruby/Cargo.lock

@@ -16,7 +16,7 @@ name = "css_inline"
 crate-type = ["cdylib"]
 
 [dependencies]
-magnus = "0.7"
+magnus = "0.8"
 rayon = "1"
 
 [dependencies.css-inline]