Upgrade to Couchbase Client 3.0.6

Closes gh-22456

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/couchbase/CouchbaseProperties.java

@@ -117,7 +117,7 @@ public class CouchbaseProperties {
 		 * Length of time an HTTP connection may remain idle before it is closed and
 		 * removed from the pool.
 		 */
-		private Duration idleHttpConnectionTimeout = Duration.ofSeconds(30);
+		private Duration idleHttpConnectionTimeout = Duration.ofMillis(4500);
 
 		public int getMinEndpoints() {
 			return this.minEndpoints;

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

@@ -215,7 +215,7 @@ bom {
 			]
 		}
 	}
-	library("Couchbase Client", "3.0.5") {
+	library("Couchbase Client", "3.0.6") {
 		group("com.couchbase.client") {
 			modules = [
 				"java-client"