Bump ini from 1.3.4 to 1.3.8 in /demo

Bumps [ini](https://github.com/isaacs/ini) from 1.3.4 to 1.3.8.
- [Release notes](https://github.com/isaacs/ini/releases)
- [Commits](npm/ini@v1.3.4...v1.3.8)

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

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