Attempt to fix unit test

Author: BoykoAlex

headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/xml/test/XMLBeansHyperlinkTest.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2019, 2023 Pivotal, Inc.
+ * Copyright (c) 2019, 2025 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -92,7 +92,7 @@ public void setup() throws Exception {
 
 		harness.changeConfiguration(new Settings(new Gson().toJsonTree(settings)));
 		// Configuration change updates indexer hence we need to wait until this occurs as well
-		indexer.waitOperation();
+		indexer.waitOperation().get();
 
 		project = projects.mavenProject("test-xml-hyperlinks");