Bump magnus from 0.4.4 to 0.5.0 (#230)

Bumps [magnus](https://github.com/matsadler/magnus) from 0.4.4 to 0.5.0.
- [Release notes](https://github.com/matsadler/magnus/releases)
- [Changelog](https://github.com/matsadler/magnus/blob/main/CHANGELOG.md)
- [Commits](matsadler/magnus@0.4.4...0.5.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

ext/commonmarker/Cargo.toml

@@ -4,7 +4,7 @@ version = "1.0.0"
 edition = "2021"
 
 [dependencies]
-magnus =  "0.4"
+magnus =  "0.5"
 comrak = { version = "0.16", features = ["shortcodes"] }
 
 [lib]