Rename Lightwheel (#225)

# Fixes #ISSUE_NUMBER
Rename LightWheel to Lightwheel

Author: mingxueg-nv

workflows/rheo/README.md

@@ -445,7 +445,7 @@ After fine-tuning or reinforcement learning, you can evaluate the success rate o
 
 ### SimReady Assets
 
-The SimReady Assets in this workflow are powered by [LightWheel](https://lightwheel.ai/). Please refer to the [Isaac for Healthcare Asset Catalog](https://github.com/isaac-for-healthcare/i4h-asset-catalog) for details.
+The SimReady Assets in this workflow are powered by [Lightwheel](https://lightwheel.ai/). Please refer to the [Isaac for Healthcare Asset Catalog](https://github.com/isaac-for-healthcare/i4h-asset-catalog) for details.
 
 ### RL Training Framework
 

workflows/rheo/scripts/simulation/assets/assets.py

@@ -28,7 +28,7 @@
 # Props
 SCISSORS_USD = ASSET_PATH + "Props/SurgicalInstruments/SurgicalScissors.usd"
 
-# Props Powered by LightWheel
+# Props Powered by Lightwheel
 # Please be noted that these assets are under Attribution-NonCommercial 4.0 International License.
 # Check the license details by replacing the usd file base name with "LICENSE.txt"