[hotfix] [kafka] Fix stale Javadoc link in FlinkKafkaProducer09

The previous link was referencing a non-existent constructor signature.

flink-connectors/flink-connector-kafka-0.9/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer09.java

@@ -219,7 +219,7 @@ public class FlinkKafkaProducer09<IN> extends FlinkKafkaProducerBase<IN> {
 	 *
 	 * @deprecated This is a deprecated constructor that does not correctly handle partitioning when
 	 *             producing to multiple topics. Use
-	 *             {@link #FlinkKafkaProducer09(String, org.apache.flink.streaming.util.serialization.KeyedDeserializationSchema, Properties, FlinkKafkaPartitioner)} instead.
+	 *             {@link #FlinkKafkaProducer09(String, KeyedSerializationSchema, Properties, FlinkKafkaPartitioner)} instead.
 	 */
 	@Deprecated
 	public FlinkKafkaProducer09(String topicId, KeyedSerializationSchema<IN> serializationSchema, Properties producerConfig, KafkaPartitioner<IN> customPartitioner) {