Bump npm from 8.5.5 to 8.12.0 in /demo/vue_demo/textfsm_online

Bumps [npm](https://github.com/npm/cli) from 8.5.5 to 8.12.0.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/latest/CHANGELOG.md)
- [Commits](npm/cli@v8.5.5...v8.12.0)

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

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

Author: dependabot[bot]