Update cpx2 to v9

Author: bcomnes

package.json

@@ -23,7 +23,7 @@
     "browser-sync": "^3.0.2",
     "chokidar": "^5.0.0",
     "clean-deep": "^3.4.0",
-    "cpx2": "^8.0.0",
+    "cpx2": "^9.0.0",
     "esbuild": "^0.28.0",
     "handlebars": "^4.7.8",
     "highlight.js": "^11.9.0",