Bump npm from 8.19.4 to 9.6.5 in /frontend (#490)

Bumps [npm](https://github.com/npm/cli) from 8.19.4 to 9.6.5.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/latest/CHANGELOG.md)
- [Commits](https://github.com/npm/cli/compare/v8.19.4...v9.6.5)

---
updated-dependencies:
- dependency-name: npm
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frontend/package.json

@@ -68,7 +68,7 @@
     "install": "^0.13.0",
     "js-sha256": "^0.9.0",
     "light-bolt11-decoder": "^3.0.0",
-    "npm": "^8.19.1",
+    "npm": "^9.6.5",
     "openpgp": "^5.2.1",
     "react": "^18.2.0",
     "react-countdown": "^2.3.2",