Bump cpy-cli from 5.0.0 to 6.0.0 in /js

Bumps [cpy-cli](https://github.com/sindresorhus/cpy-cli) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/sindresorhus/cpy-cli/releases)
- [Commits](sindresorhus/cpy-cli@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: cpy-cli
  dependency-version: 6.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

js/package.json

@@ -55,7 +55,7 @@
     "@babel/preset-env": "^7.27.2",
     "@jupyterlab/builder": "^4.4.5",
     "babel-jest": "^30.1.2",
-    "cpy-cli": "^5.0.0",
+    "cpy-cli": "^6.0.0",
     "eslint": "^8.57.1",
     "eslint-config-airbnb": "^19.0.4",
     "eslint-config-airbnb-base": "^15.0.0",