Bump html5ever from 0.27.0 to 0.28.0 in /native/html5ever_nif

Bumps [html5ever](https://github.com/servo/html5ever) from 0.27.0 to 0.28.0.
- [Commits](https://github.com/servo/html5ever/commits)

---
updated-dependencies:
- dependency-name: html5ever
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

native/html5ever_nif/Cargo.lock

@@ -13,7 +13,7 @@ crate-type = ["cdylib"]
 # See the Precompilation guide for details about the features: https://github.com/philss/rustler_precompiled/blob/main/PRECOMPILATION_GUIDE.md
 rustler = { version = "0.33", default-features = false, features = ["derive", "nif_version_2_15"] }
 
-html5ever = "0.27"
+html5ever = "0.28"
 markup5ever = "0.12"
 
 tendril = "0.4"