Bump comrak from 0.20.0 to 0.28.0

Bumps [comrak](https://github.com/kivikakk/comrak) from 0.20.0 to 0.28.0.
- [Release notes](https://github.com/kivikakk/comrak/releases)
- [Changelog](https://github.com/kivikakk/comrak/blob/main/changelog.txt)
- [Commits](kivikakk/comrak@0.20.0...v0.28.0)

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

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

Cargo.toml

@@ -13,7 +13,7 @@ askama = { version = "0.12.1", features = ["with-rocket", "mime", "mime_guess"]
 askama_rocket = "0.12.0"
 reqwest = { version = "0.12", features = ["deflate", "brotli", "gzip"] }
 tokio = { version = "1", features = ["full"] }
-comrak = "0.20"
+comrak = "0.28"
 regex = "1"
 lazy_static = "1.4.0"
 percent-encoding = "2.3.1"