chore: adding better example

README.md

@@ -72,5 +72,5 @@ Besides a status, meshStack can also show custom user messages consuming the ser
     step_id: "terraform-validate"
     status: ${{ steps.terraform-validate.outcome == 'success' && 'SUCCEEDED' || 'FAILED' }} 
     user_message: ${{ steps.terraform-validate.outcome == 'success' && 'Successful plan Terraform configuration.' || 'Failed to plan Terraform configuration.' }}
-   system_message:  ${{ steps.terraform-validate.outcome == 'success' && 'Successful plan Terraform configuration.' || 'Failed to plan Terraform configuration.' }}
+    system_message:  ${{ steps.terraform-validate.outcome == 'success' && 'Successful plan Terraform configuration.' || 'Failed to plan Terraform configuration.' }}
 ```