ui: bump dotenv from 16.5.0 to 16.6.1 in /ui

Bumps [dotenv](https://github.com/motdotla/dotenv) from 16.5.0 to 16.6.1.
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](motdotla/dotenv@v16.5.0...v16.6.1)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-version: 16.6.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]