refactor: Add comments to build workflow

.github/workflows/build-and-test-powershell-module.yml

@@ -7,13 +7,15 @@ on:
   # Allows you to run this workflow manually from the Actions tab.
   workflow_dispatch:
 
+  # Allows the deployment workflow to call this workflow.
   workflow_call:
     inputs:
       versionNumber:
         description: 'The version number to use for the module. This should be in the format of "Major.Minor.Patch". e.g. "1.0.0". Future builds will increment from this version number. This input is optional. If not provided, the previous version numbers Patch will be incremented.'
         required: false
         type: string
         default: ''
+    # Outputs required by the deployment workflow.
     outputs:
       powerShellModuleName:
         description: 'The name of the PowerShell module being built.'