Fix class condition on deprecated class

Closes gh-26107

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/elasticsearch/ElasticsearchDataAutoConfiguration.java

 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.elasticsearch.ElasticsearchRestClientAutoConfiguration;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
-import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
+import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
 import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;
 import org.springframework.data.elasticsearch.repository.config.EnableReactiveElasticsearchRepositories;
 
@@ -38,7 +38,7 @@ import org.springframework.data.elasticsearch.repository.config.EnableReactiveEl
  * @since 1.1.0
  */
 @Configuration(proxyBeanMethods = false)
-@ConditionalOnClass({ ElasticsearchTemplate.class })
+@ConditionalOnClass({ ElasticsearchRestTemplate.class })
 @AutoConfigureAfter({ ElasticsearchRestClientAutoConfiguration.class,
 		ReactiveElasticsearchRestClientAutoConfiguration.class })
 @Import({ ElasticsearchDataConfiguration.BaseConfiguration.class,