Bump postcss-html from 1.8.1 to 2.0.0

Bumps [postcss-html](https://github.com/ota-meshi/postcss-html) from 1.8.1 to 2.0.0.
- [Release notes](https://github.com/ota-meshi/postcss-html/releases)
- [Commits](ota-meshi/postcss-html@v1.8.1...v2.0.0)

---
updated-dependencies:
- dependency-name: postcss-html
  dependency-version: 2.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -92,7 +92,7 @@
     "jsdoc-to-markdown": "^9.1.3",
     "libxml2-wasm": "^0.7.1",
     "minimist": "^1.2.8",
-    "postcss-html": "^1.8.1",
+    "postcss-html": "^2.0.0",
     "stylelint": "~17.14.1",
     "stylelint-config-html": "~1.1.0",
     "stylelint-config-recess-order": "~7.7.0",