Bump minimist from 1.2.5 to 1.2.8 in /demo

Bumps [minimist](https://github.com/minimistjs/minimist) from 1.2.5 to 1.2.8.
- [Changelog](https://github.com/minimistjs/minimist/blob/main/CHANGELOG.md)
- [Commits](minimistjs/minimist@v1.2.5...v1.2.8)

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

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

Author: dependabot[bot]