Merge pull request #1008 from yanmxa/br_confluent_doc

Propose the `confluent-kafka-go` binding for Kafka

Author: lionelvillard

docs/protocol_implementations.md

@@ -24,6 +24,8 @@ the `Write<DataStructure>` functions, while the latter is done implementing spec
 * [AMQP Protocol Binding](https://github.com/cloudevents/sdk-go/tree/main/protocol/amqp) using [go-amqp](https://github.com/Azure/go-amqp)
 * [HTTP Protocol Binding](https://github.com/cloudevents/sdk-go/tree/main/v2/protocol/http) using [net/http](https://golang.org/pkg/net/http/)
 * [Kafka Protocol Binding](https://github.com/cloudevents/sdk-go/tree/main/protocol/kafka_sarama) using [Sarama](https://github.com/Shopify/sarama)
+* [Kafka Protocol Binding](https://github.com/cloudevents/sdk-go/tree/main/protocol/kafka_confluent) using [confluent-kafka-go](https://github.com/confluentinc/confluent-kafka-go)
+  > It bring some new features compared the above [sarama](https://github.com/Shopify/sarama) binding. Like [pattern subscription](https://github.com/confluentinc/confluent-kafka-go/issues/96), [async message confirmation](https://github.com/cloudevents/sdk-go/issues/846) and other enhancements.
 * [MQTT Protocol Binding](https://github.com/cloudevents/sdk-go/tree/main/protocol/mqtt_paho) using [eclipse/paho.golang](https://github.com/eclipse/paho.golang)
 * [NATS Protocol Binding](https://github.com/cloudevents/sdk-go/tree/main/protocol/nats) using [nats.go](https://github.com/nats-io/nats.go)
 * [STAN Protocol Binding](https://github.com/cloudevents/sdk-go/tree/main/protocol/stan) using [stan.go](https://github.com/nats-io/stan.go)