hector_gazebo: 0.3.3-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `hector_gazebo` to `0.3.3-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.9`
- previous version for package: `0.3.2-0`

## hector_gazebo

- No changes

## hector_gazebo_plugins

- No changes

## hector_gazebo_thermal_camera

```
* Fix bad bug with index access
* Contributors: Stefan Kohlbrecher
```

## hector_gazebo_worlds

- No changes

## hector_sensors_gazebo

- No changes