Fix(css-vars-updater): change package type to module (#832)

Author: wise-king-sullyman

packages/css-vars-updater/package.json

@@ -4,6 +4,7 @@
   "description": "Utility to update Patternfly CSS variables when migrating from V5 to a new design token system in V6",
   "author": "Red Hat",
   "license": "MIT",
+  "type": "module",
   "bin": "./dist/cli.js",
   "engines": {
     "node": ">=18"