fix(google-genai): Fix specification errors

Signed-off-by: yinh <fottas@163.com>

Author: Fottas

auto-configurations/models/spring-ai-autoconfigure-model-google-genai/src/test/java/org/springframework/ai/model/google/genai/autoconfigure/chat/GoogleGenAiPropertiesTests.java

@@ -18,13 +18,13 @@
 
 import org.junit.jupiter.api.Test;
 
+import java.time.Duration;
+
 import org.springframework.ai.model.google.genai.autoconfigure.embedding.GoogleGenAiEmbeddingConnectionProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Configuration;
 
-import java.time.Duration;
-
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**