build(deps-dev): bump copy-webpack-plugin in /superset-frontend

Bumps [copy-webpack-plugin](https://github.com/webpack-contrib/copy-webpack-plugin) from 9.1.0 to 12.0.2.
- [Release notes](https://github.com/webpack-contrib/copy-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/copy-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/copy-webpack-plugin@v9.1.0...v12.0.2)

---
updated-dependencies:
- dependency-name: copy-webpack-plugin
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

superset-frontend/package.json

@@ -278,7 +278,7 @@
     "babel-plugin-jsx-remove-data-test-id": "^2.1.3",
     "babel-plugin-lodash": "^3.3.4",
     "chromatic": "^6.7.4",
-    "copy-webpack-plugin": "^9.1.0",
+    "copy-webpack-plugin": "^12.0.2",
     "cross-env": "^5.2.1",
     "css-loader": "^6.8.1",
     "css-minimizer-webpack-plugin": "^5.0.1",