fix vertordbs opensearch.adoc

Signed-off-by: hungrytech <[email protected]>

Author: hungrytech

spring-ai-docs/src/main/antora/modules/ROOT/pages/api/vectordbs/opensearch.adoc

@@ -77,7 +77,7 @@ List<Document> documents = List.of(
 vectorStore.add(documents);
 
 // Retrieve documents similar to a query
-List<Document> results = vectorStore.similaritySearch(SearchRequest.build().query("Spring").topK(5).build());
+List<Document> results = vectorStore.similaritySearch(SearchRequest.builder().query("Spring").topK(5).build());
 ----
 
 === Configuration Properties