urdfdom_headers: 0.2.3-1 in 'hydro/release.yaml' [bloom]

Increasing version of package(s) in repository `urdfdom_headers`:
- previous version: `0.2.3-0`
- new version: `0.2.3-1`
- distro file: `hydro/release.yaml`
- bloom version: `0.4.2`