build(deps): bump openpgp from 5.3.0 to 5.3.1

Bumps [openpgp](https://github.com/openpgpjs/openpgpjs) from 5.3.0 to 5.3.1.
- [Release notes](https://github.com/openpgpjs/openpgpjs/releases)
- [Commits](openpgpjs/openpgpjs@v5.3.0...v5.3.1)

---
updated-dependencies:
- dependency-name: openpgp
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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