Fixes minor typos in docs (#1119)

# Description

Fix small typos in the documentation and comments

## Type of change

- This change requires a documentation update

## 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
- [ ] 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

CONTRIBUTORS.md

@@ -49,6 +49,7 @@ Guidelines for modifications:
 * Johnson Sun
 * Kaixi Bao
 * Kourosh Darvish
+* Lionel Gulich
 * Lorenz Wellhausen
 * Masoud Moghani
 * Michael Gussert

docs/source/overview/teleop_imitation.rst

@@ -60,7 +60,7 @@ format.
       # install python module (for robomimic)
       ./isaaclab.sh -i robomimic
       # split data
-      ./isaaclab.sh -p source/standalone//workflows/robomimic/tools/split_train_val.py logs/robomimic/Isaac-Lift-Cube-Franka-IK-Rel-v0/hdf_dataset.hdf5 --ratio 0.2
+      ./isaaclab.sh -p source/standalone/workflows/robomimic/tools/split_train_val.py logs/robomimic/Isaac-Lift-Cube-Franka-IK-Rel-v0/hdf_dataset.hdf5 --ratio 0.2
 
 3. Train a BC agent for ``Isaac-Lift-Cube-Franka-IK-Rel-v0`` with
    `Robomimic <https://robomimic.github.io/>`__:

source/standalone/demos/quadrupeds.py

@@ -49,7 +49,7 @@ from omni.isaac.lab_assets.unitree import UNITREE_A1_CFG, UNITREE_GO1_CFG, UNITR
 
 
 def define_origins(num_origins: int, spacing: float) -> list[list[float]]:
-    """Defines the origins of the the scene."""
+    """Defines the origins of the scene."""
     # create tensor based on number of environments
     env_origins = torch.zeros(num_origins, 3)
     # create a grid of origins