Bump net.sourceforge.pmd:pmd-ant from 7.19.0 to 7.20.0 (#7495)

Bumps [net.sourceforge.pmd:pmd-ant](https://github.com/pmd/pmd) from 7.19.0 to 7.20.0.
- [Release notes](https://github.com/pmd/pmd/releases)
- [Commits](pmd/pmd@pmd_releases/7.19.0...pmd_releases/7.20.0)

---
updated-dependencies:
- dependency-name: net.sourceforge.pmd:pmd-ant
  dependency-version: 7.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]