fix: fix the import

Signed-off-by: Sun Yuhan <[email protected]>

Author: sunyuhan1998

spring-ai-rag/src/test/java/org/springframework/ai/rag/preretrieval/query/transformation/RewriteQueryTransformerTests.java

@@ -21,6 +21,7 @@
 import ch.qos.logback.core.read.ListAppender;
 import org.junit.jupiter.api.Test;
 import org.slf4j.LoggerFactory;
+
 import org.springframework.ai.chat.client.ChatClient;
 import org.springframework.ai.chat.prompt.PromptTemplate;