build(deps-dev): bump @webref/css from 8.1.0 to 8.1.1 (#2912)

Author: dependabot[bot]

package-lock.json

@@ -97,7 +97,7 @@
     "@types/superagent": "^8.1.9",
     "@types/webidl2": "^24.4.3",
     "@types/yargs": "^17.0.35",
-    "@webref/css": "8.1.0",
+    "@webref/css": "8.1.1",
     "@webref/elements": "^2.5.1",
     "@webref/idl": "3.69.0",
     "c8": "10.1.3",