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

Fixes #3856

Signed-off-by: lihuagang03 <[email protected]>
(cherry picked from commit 6a3c6a2)

Author: lihuagang03

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

@@ -261,7 +261,7 @@ interface ChatClientRequestSpec {
 	 */
 	interface Builder {
 
-		Builder defaultAdvisors(Advisor... advisor);
+		Builder defaultAdvisors(Advisor... advisors);
 
 		Builder defaultAdvisors(Consumer<AdvisorSpec> advisorSpecConsumer);