Changes to Change one voice number

added the new optional request property allOf[subschema #2: SentDmServicesEndpointsCustomerAPIv3ChannelsRequestsPatchVoiceChannelRequest_Properties]/agent_id

added the non-success response with the status 502

added the optional property data/allOf[#/components/schemas/SentDmServicesCommonChannelsContractsVoiceNumberState]/agent_id to the response with the 200 status

added the optional property data/allOf[#/components/schemas/SentDmServicesCommonChannelsContractsVoiceNumberState]/routes_to to the response with the 200 status

endpoint added