rqt_pr2_dashboard: 0.2.6-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `rqt_pr2_dashboard` to `0.2.6-0`:

- upstream repository: https://github.com/ros-visualization/rqt_pr2_dashboard.git
- release repository: https://github.com/ros-gbp/rqt_pr2_dashboard-release.git
- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.12-issue211`
- previous version for package: `0.2.5-0`

## rqt_pr2_dashboard

```
* update maintainer (#16 <https://github.com/PR2/rqt_pr2_dashboard/issues/16>)
```