Improve method param name in ChatClient.Builder.defaultAdvisors() (spring-projects#3856)

Auto-cherry-pick to 1.0.x
Fixes spring-projects#3856

Signed-off-by: lihuagang03 <bert825_work@163.com>
Signed-off-by: logan-mac <ralla0405@gmail.com>

Author: lihuagang03

spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/ChatClient.java

@@ -269,7 +269,7 @@ interface ChatClientRequestSpec {
 	 */
 	interface Builder {
 
-		Builder defaultAdvisors(Advisor... advisor);
+		Builder defaultAdvisors(Advisor... advisors);
 
 		Builder defaultAdvisors(Consumer<AdvisorSpec> advisorSpecConsumer);