Update delivery timeout config comments in tests

Signed-off-by: Thomas Cooper <[email protected]>

Author: tomncooper

flink-connector-kafka/src/test/java/org/apache/flink/connector/kafka/sink/KafkaWriterFaultToleranceITCase.java

@@ -40,6 +40,8 @@ public class KafkaWriterFaultToleranceITCase extends KafkaWriterTestBase {
     private static final String INIT_KAFKA_RETRIES = "0";
     private static final String INIT_KAFKA_REQUEST_TIMEOUT_MS = "1000";
     private static final String INIT_KAFKA_MAX_BLOCK_MS = "1000";
+    /** The delivery timeout has to be greater than the request timeout as the
+     * latter is part of the former and this is enforced by a compile time check. */
     private static final String INIT_KAFKA_DELIVERY_TIMEOUT_MS = "1500";
 
     @RegisterExtension