"Now Processing " order note should be optional

https://github.com/Flutterwave/rave-woocommerce/blob/db639f41c311154aeb516725b3eafd7a9d4a58f1/includes/eventHandler.php#L39

The note added to orders indicating that orders are "_now being processed_" should be optional. Not all stores use that workflow. Digital products (as in my use case) are immediately marked as complete. Adding a "Processing" note is just confusing for the customer.