Bump @webref/css from 8.0.2 to 8.1.0 in the webref-css group

Bumps the webref-css group with 1 update: [@webref/css](https://github.com/w3c/webref).


Updates `@webref/css` from 8.0.2 to 8.1.0
- [Commits](https://github.com/w3c/webref/compare/@webref/[email protected]...@webref/[email protected])

---
updated-dependencies:
- dependency-name: "@webref/css"
  dependency-version: 8.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: webref-css
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -36,7 +36,7 @@
 		"dist"
 	],
 	"devDependencies": {
-		"@webref/css": "8.0.2",
+		"@webref/css": "8.1.0",
 		"css-tree": "^3.1.0",
 		"postcss": "^8.4"
 	},

packages/css-syntax-patches-for-csstree/package.json

@@ -129,7 +129,7 @@
 		"@csstools/pack-test": "*",
 		"@csstools/postcss-bundler": "*",
 		"@csstools/postcss-tape": "*",
-		"@webref/css": "8.0.2"
+		"@webref/css": "8.1.0"
 	},
 	"scripts": {
 		"prebuild": "node ./scripts/generate-plugins-data.mjs && eslint --fix ./src/plugins/*.mjs",