Bump specberus from 5.3.0 to 5.4.1
Bump specberus from 5.3.0 to 5.4.1

Bumps [specberus](https://github.com/w3c/specberus) from 5.3.0 to 5.4.1.
- [Release notes](https://github.com/w3c/specberus/releases)
- [Commits](https://github.com/w3c/specberus/compare/v5.3.0...v5.4.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
w3c/echidna,w3c/echidna,w3c/echidna