Upgrade to Elasticsearch 7.6.1

See gh-20423

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/VersionOverridingElasticsearchContainer.java

@@ -32,7 +32,7 @@ public class VersionOverridingElasticsearchContainer extends ElasticsearchContai
 	/**
 	 * Elasticsearch version
 	 */
-	protected static final String ELASTICSEARCH_VERSION = "7.5.1";
+	protected static final String ELASTICSEARCH_VERSION = "7.6.1";
 
 	public VersionOverridingElasticsearchContainer() {
 		super(ELASTICSEARCH_IMAGE + ":" + ELASTICSEARCH_VERSION);

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

@@ -275,7 +275,7 @@ bom {
 			]
 		}
 	}
-	library("Elasticsearch", "7.5.2") {
+	library("Elasticsearch", "7.6.1") {
 		group("org.elasticsearch") {
 			modules = [
 				"elasticsearch"