Update README.md (ylabbe#27)

Author: azad96

README.md

@@ -129,7 +129,7 @@ Notes:
 - The URDF files were obtained using these commands (requires `meshlab` to be installed):
 ```
 python -m cosypose.scripts.convert_models_to_urdf --models=ycbv
-python -m cosypose.scripts.convert_models_to_urdf --modles=tless.cad
+python -m cosypose.scripts.convert_models_to_urdf --models=tless.cad
 ```
 - Compatibility models were obtained using the following script:
 ```