jackal_simulator: 0.2.3-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `jackal_simulator` to `0.2.3-0`:

- upstream repository: https://github.com/jackal/jackal_simulator
- release repository: https://github.com/clearpath-gbp/jackal_simulator-release.git
- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.15`
- previous version for package: `0.2.2-0`

## jackal_gazebo

```
* Added jackal_race world.
* Add hector_gazebo_plugins dependency.
* Contributors: Mike Purvis, spourmehr
```

## jackal_simulator

- No changes