Fixes the render interval for reach environments (#695)

# Description

The render interval for reach environments was not equal to the decimation, resulting in
unnecessary rendering steps.

## Type of change

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

source/extensions/omni.isaac.lab_tasks/omni/isaac/lab_tasks/manager_based/manipulation/reach/reach_env_cfg.py

@@ -201,6 +201,7 @@ class ReachEnvCfg(ManagerBasedRLEnvCfg):
         """Post initialization."""
         # general settings
         self.decimation = 2
+        self.sim.render_interval = self.decimation
         self.episode_length_s = 12.0
         self.viewer.eye = (3.5, 3.5, 3.5)
         # simulation settings