feat(content): update the api

#### content:v2.1

The following keys were added:
- resources.buyongoogleprograms.methods.activate (Total Keys: 14)
- resources.buyongoogleprograms.methods.pause (Total Keys: 14)
- resources.buyongoogleprograms.methods.requestreview (Total Keys: 14)
- resources.orderreturns.resources.labels.methods.create (Total Keys: 15)
- resources.products.methods.update (Total Keys: 18)
- schemas.AccountsLinkRequest.properties.paymentServiceProviderLinkInfo.$ref (Total Keys: 1)
- schemas.ActivateBuyOnGoogleProgramRequest (Total Keys: 2)
- schemas.CarriersCarrier.properties.eddServices (Total Keys: 2)
- schemas.DeliveryTime.properties.warehouseBasedDeliveryTimes (Total Keys: 2)
- schemas.OrderreturnsLineItem.properties.productId.type (Total Keys: 1)
- schemas.PauseBuyOnGoogleProgramRequest (Total Keys: 2)
- schemas.PaymentServiceProviderLinkInfo (Total Keys: 4)
- schemas.Product.properties.additionalSizeType.type (Total Keys: 1)
- schemas.ProductShipping.properties.maxHandlingTime (Total Keys: 2)
- schemas.ProductShipping.properties.maxTransitTime (Total Keys: 2)
- schemas.ProductShipping.properties.minHandlingTime (Total Keys: 2)
- schemas.ProductShipping.properties.minTransitTime (Total Keys: 2)
- schemas.ProductsCustomBatchRequestEntry.properties.updateMask (Total Keys: 2)
- schemas.RequestReviewBuyOnGoogleProgramRequest (Total Keys: 2)
- schemas.ReturnShippingLabel (Total Keys: 5)
- schemas.WarehouseBasedDeliveryTime (Total Keys: 9)