"Now Processing " order note should be optional

[twmbx]

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.