Fix non existing javadocs link in RestClientTests

client/rest/src/test/java/org/elasticsearch/client/RestClientTests.java

@@ -96,7 +96,7 @@ public class RestClientTests extends RestClientTestCase {
     }
 
     /**
-     * @deprecated will remove method in 7.0 but needs tests until then. Replaced by {@link RequestTests#testSetParameters()}.
+     * @deprecated will remove method in 7.0 but needs tests until then. Replaced by {@link RequestTests#testAddParameters()}.
      */
     @Deprecated
     public void testPerformOldStyleAsyncWithNullParams() throws Exception {