Bump shell-quote from 1.6.1 to 1.8.1 in /blueocean-web (jenkinsci#2509)

Bumps [shell-quote](https://github.com/ljharb/shell-quote) from 1.6.1 to 1.8.1.
- [Changelog](https://github.com/ljharb/shell-quote/blob/main/CHANGELOG.md)
- [Commits](ljharb/shell-quote@v1.6.1...v1.8.1)

---
updated-dependencies:
- dependency-name: shell-quote
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Olivier Lamy <olamy@apache.org>