Update package.json

Author: jelveh

src/docs/package.json

@@ -24,6 +24,7 @@
     "html-entities": "^2.3.3",
     "jquery": "^4.0.0",
     "js-yaml": "^4.1.0",
+    "cssstyle": "^4.2.1",
     "jsdom": "^26.1.0",
     "marked": "^11.1.1"
   },