build(deps): bump proxy-addr from 2.0.7 to 2.0.8 in /ui

Bumps [proxy-addr](https://github.com/jshttp/proxy-addr) from 2.0.7 to 2.0.8.
- [Release notes](https://github.com/jshttp/proxy-addr/releases)
- [Changelog](https://github.com/jshttp/proxy-addr/blob/master/HISTORY.md)
- [Commits](jshttp/proxy-addr@v2.0.7...v2.0.8)

---
updated-dependencies:
- dependency-name: proxy-addr
  dependency-version: 2.0.8
  dependency-type: indirect
...

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

Author: dependabot[bot]