Bump tar from 6.1.3 to 6.1.11 in /frontend (from PR #2399)
Bump tar from 6.1.3 to 6.1.11 in /frontend (from PR #2399)

Bumps [tar](https://github.com/npm/node-tar) from 6.1.3 to 6.1.11.
- [Release notes](https://github.com/npm/node-tar/releases)
- [Changelog](https://github.com/npm/node-tar/blob/main/CHANGELOG.md)
- [Commits](https://github.com/npm/node-tar/compare/v6.1.3...v6.1.11)

mozilla-services/tecken,mozilla-services/tecken,mozilla-services/tecken,mozilla-services/tecken