Changes to Update a addon

removed the request property charges/overagePricingModels/items/billingCadence

removed the request property charges/overagePricingModels/items/billingModel

added the new ContractNotFound enum value to the code response property for the response status 404

added the new optional request property charges/overagePricingModels/items/creditEntitlement

removed the request property charges/overagePricingModels/items/topUpCustomCurrencyId

added the new CreditOveragePriceCurrencyNotFound enum value to the code response property for the response status 400

added the new InvalidCreditOverageBillingModel enum value to the code response property for the response status 400

added the new InvoicePreviewNotAvailableForDraftContract enum value to the code response property for the response status 400

added the new OveragePriceNotSupportedOnAddon enum value to the code response property for the response status 400

added the new OveragePriceRequiresUsageLimit enum value to the code response property for the response status 400

added the new optional request property charges/overagePricingModels/items/currencyId

added the new GovernanceNotEnabled enum value to the code response property for the response status 403

the maxQuantity request property's exclusiveMinimum was set to true

the maxQuantity request property's min was set to 0.00

added the new optional header request parameter X-ACCOUNT-ID

added the new optional header request parameter X-ENVIRONMENT-ID

added the new PricingModelNotSupportedByBillingIntegration enum value to the code response property for the response status 400

added the new DataExportIntegrationError enum value to the code response property for the response status 400

added the new InvalidReceivedSignatureError enum value to the code response property for the response status 400