Fixes example commands in installation docs (#263)

forgot to change the actual code for the user that loads the ant example
after isnstallation

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [X] I have made corresponding changes to the documentation
- [X] My changes generate no new warnings
- [X] I have added tests that prove my fix is effective or that my
feature works
- [X] 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

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docs/source/setup/installation/pip_installation.rst

@@ -354,14 +354,14 @@ You can now use Isaac Lab to train a robot through Reinforcement Learning! The q
 
       .. code:: bash
 
-         ./isaaclab.sh -p source/standalone/workflows/rsl_rl/train.py --task=Isaac-Repose-Cube-Shadow-Vision-Direct-v0 --enable_cameras
+         ./isaaclab.sh -p source/standalone/workflows/rsl_rl/train.py --task=Isaac-Ant-v0
 
    .. tab-item:: :icon:`fa-brands fa-windows` Windows
       :sync: windows
 
       .. code:: batch
 
-         isaaclab.bat -p source/standalone/workflows/rsl_rl/train.py --task=Isaac-Repose-Cube-Shadow-Vision-Direct-v0 --enable_cameras
+         isaaclab.bat -p source/standalone/workflows/rsl_rl/train.py --task=Isaac-Ant-v0
 
 ... Or a robot dog!