[Security] Bump concat-stream from 1.5.1 to 1.6.2
[Security] Bump concat-stream from 1.5.1 to 1.6.2

Bumps [concat-stream](https://github.com/maxogden/concat-stream) from 1.5.1 to 1.6.2. **This update includes security fixes.**
- [Release notes](https://github.com/maxogden/concat-stream/releases)
- [Commits](https://github.com/maxogden/concat-stream/compare/v1.5.1...v1.6.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
LLK/scratch-www,LLK/scratch-www