schunk_modular_robotics: 0.5.4-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `schunk_modular_robotics` to `0.5.4-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.2`
- previous version for package: `0.5.3-0`

## schunk_description

- No changes

## schunk_libm5api

- No changes

## schunk_modular_robotics

- No changes

## schunk_powercube_chain

```
* Merge branch 'hydro_dev' into hydro_release_candidate
* merge
* added missing dependency
* Contributors: Florian Weisshardt, ipa-fxm
```

## schunk_sdh

- No changes

## schunk_simulated_tactile_sensors

- No changes