build(deps): bump github.com/bitcoin-sv/go-paymail from 0.3.0 to 0.4.0

Bumps [github.com/bitcoin-sv/go-paymail](https://github.com/bitcoin-sv/go-paymail) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/bitcoin-sv/go-paymail/releases)
- [Changelog](https://github.com/bitcoin-sv/go-paymail/blob/main/CHANGELOG.md)
- [Commits](bitcoin-sv/go-paymail@v0.3.0...v0.4.0)

---
updated-dependencies:
- dependency-name: github.com/bitcoin-sv/go-paymail
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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