Bump dompdf/dompdf from 3.0.2 to 3.1.0

Bumps [dompdf/dompdf](https://github.com/dompdf/dompdf) from 3.0.2 to 3.1.0.
- [Release notes](https://github.com/dompdf/dompdf/releases)
- [Commits](dompdf/dompdf@v3.0.2...v3.1.0)

---
updated-dependencies:
- dependency-name: dompdf/dompdf
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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