chore(deps): Bump terser from 5.10.0 to 5.14.2 in /userdocs

Bumps [terser](https://github.com/terser/terser) from 5.10.0 to 5.14.2.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/commits)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: indirect
...

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