fix: Error when switching coupon discount type

[victormattosvm]

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updateCoupon mutation error

I can't change the coupon discount type from "FIXED PRODUCT" to "PERCENT" or vice versa when the amount is higher than 100 and the amount input is set before the discountType in the mutation.

What does this implement/fix? Explain your changes.

My fix sets the coupon discount type before Woocommerce checks if the amount is valid or not.

Steps to reproduce the issue

1- Create a new coupon with discount type 'FIXED_PRODUCT' and set an amount of 200 2- Change the discount type to 'PERCENT', keeping the same amount. IMPORTANT: put the amount input before the discountType in the mutation. 3. An error will be generated, because when validating the amount, the discount type will still be the old one (PERCENT) and 200 is invalid for percentage.

• WooGraphQL Version: 0.10.7
• WPGraphQL Version: 1.6.12
• WordPress Version: 5.8.3
• WooCommerce Version: 6.1.0