Setup venv with pip in uv to fix broken workflow in guide

Author: yanziz-nvidia

docs/source/setup/installation/include/pip_python_virtual_env.rst

@@ -45,8 +45,8 @@ If you wish to install Isaac Sim 4.5, please use modify the instructions accordi
 
                .. code-block:: bash
 
-                  # create a virtual environment named env_isaaclab with python3.11
-                  uv venv --python 3.11 env_isaaclab
+                  # create a virtual environment named env_isaaclab with python3.11 and pip
+                  uv venv --python 3.11 --seed env_isaaclab
                   # activate the virtual environment
                   source env_isaaclab/bin/activate
 
@@ -55,8 +55,8 @@ If you wish to install Isaac Sim 4.5, please use modify the instructions accordi
 
                .. code-block:: batch
 
-                  :: create a virtual environment named env_isaaclab with python3.11
-                  uv venv --python 3.11 env_isaaclab
+                  :: create a virtual environment named env_isaaclab with python3.11 and pip
+                  uv venv --python 3.11 --seed env_isaaclab
                   :: activate the virtual environment
                   env_isaaclab\Scripts\activate