Upgrade to Elasticsearch Client 8.4.3

Closes gh-32671

Author: snicoll

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/data/elasticsearch/ElasticsearchReactiveHealthIndicator.java

@@ -66,8 +66,7 @@ private Health processResponse(Health.Builder builder, HealthResponse response)
 			builder.withDetail("delayed_unassigned_shards", response.delayedUnassignedShards());
 			builder.withDetail("number_of_pending_tasks", response.numberOfPendingTasks());
 			builder.withDetail("number_of_in_flight_fetch", response.numberOfInFlightFetch());
-			builder.withDetail("task_max_waiting_in_queue_millis",
-					response.taskMaxWaitingInQueueMillis().toEpochMilli());
+			builder.withDetail("task_max_waiting_in_queue_millis", response.taskMaxWaitingInQueueMillis());
 			builder.withDetail("active_shards_percent_as_number",
 					Double.parseDouble(response.activeShardsPercentAsNumber()));
 			return builder.build();

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -211,7 +211,7 @@ bom {
 			]
 		}
 	}
-	library("Elasticsearch Client", "8.3.3") {
+	library("Elasticsearch Client", "8.4.3") {
 		group("org.elasticsearch.client") {
 			modules = [
 				"elasticsearch-rest-client" {