chore(deps): bump @github/copilot from 0.0.420 to 0.0.421 in /nodejs

Bumps [@github/copilot](https://github.com/github/copilot-cli) from 0.0.420 to 0.0.421.
- [Release notes](https://github.com/github/copilot-cli/releases)
- [Changelog](https://github.com/github/copilot-cli/blob/main/changelog.md)
- [Commits](github/copilot-cli@v0.0.420...v0.0.421)

---
updated-dependencies:
- dependency-name: "@github/copilot"
  dependency-version: 0.0.421
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

nodejs/package-lock.json

@@ -40,7 +40,7 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@github/copilot": "^0.0.420",
+    "@github/copilot": "^0.0.421",
     "vscode-jsonrpc": "^8.2.1",
     "zod": "^4.3.6"
   },