Bump element-plus from 1.2.0-beta.6 to 2.9.3 in /ui

Bumps [element-plus](https://github.com/element-plus/element-plus) from 1.2.0-beta.6 to 2.9.3.
- [Release notes](https://github.com/element-plus/element-plus/releases)
- [Changelog](https://github.com/element-plus/element-plus/blob/dev/CHANGELOG.en-US.md)
- [Commits](element-plus/element-plus@1.2.0-beta.6...2.9.3)

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

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

Author: dependabot[bot]