Bump dns-packet from 5.3.1 to 5.4.0 in /docs

Bumps [dns-packet](https://github.com/mafintosh/dns-packet) from 5.3.1 to 5.4.0.
- [Release notes](https://github.com/mafintosh/dns-packet/releases)
- [Changelog](https://github.com/mafintosh/dns-packet/blob/master/CHANGELOG.md)
- [Commits](mafintosh/dns-packet@v5.3.1...5.4.0)

---
updated-dependencies:
- dependency-name: dns-packet
  dependency-type: indirect
...

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

Author: dependabot[bot]