Enable additionalArguments in gitversion action

- Un-commented the 'with' section under the gitversion execution step in the GitHub workflow.
- Added 'additionalArguments: '/showConfig'' to display configuration details during runtime.

.github/workflows/main.yaml

@@ -53,7 +53,8 @@ jobs:
 
       - name: tools - gitversion - execute
         uses: gittools/actions/gitversion/[email protected]
-        # with:
+        with:
+          additionalArguments: '/showConfig'
         #   useConfigFile: true
         #   configFilePath: GitVersion.yaml