Update table syntax in setup.rst

Refs NOAA-EMC#1272

docs/source/setup.rst

@@ -4,9 +4,12 @@ Experiment Setup
 
  Global workflow uses a set of scripts to help configure and set up the drivers (also referred to as Workflow Manager) that run the end-to-end system. While currently we use a `ROCOTO <https://github.com/christopherwharrop/rocoto/wiki/documentation>`__ based system and that is documented here, an `ecFlow <https://www.ecmwf.int/en/learning/training/introduction-ecmwf-job-scheduler-ecflow>`__ based systm is also under development and will be introduced to the Global Workflow when it is mature. To run the setup scripts, you need to make sure to have a copy of ``python3`` with ``numpy`` available. The easiest way to guarantee this is to load python from the `official hpc-stack installation <https://github.com/NOAA-EMC/hpc-stack/wiki/Official-Installations>`_ for the machine you are on:
 
-.. list-table::
+.. list-table:: Python Module Load Commands
+   :widths: 25 150
+   :header-rows: 1
+
    * - **MACHINE**
-     - **PYTHON MODULE LOAD COMMAND(S)**
+     - **COMMAND(S)**
    * - Hera
      - | ``module use -a /contrib/anaconda/modulefiles``
      - | ``module load anaconda/anaconda3-5.3.1``
@@ -19,9 +22,12 @@ Experiment Setup
 
 If running with Rocoto make sure to have a Rocoto module loaded before running setup scripts:
 
-.. list-table::
+.. list-table:: ROCOTO Module Load Commands
+   :widths: 25 150
+   :header-rows: 1
+
    * - **MACHINE**
-     - **ROCOTO MODULE LOAD COMMAND(S)**
+     - **COMMAND(S)**
    * - Hera
      - ``module load rocoto/1.3.3``
    * - Orion