fix(openai): o3 model snapshot key

Author: BEOKS

models/spring-ai-openai/src/main/java/org/springframework/ai/openai/api/OpenAiApi.java

@@ -329,7 +329,7 @@ public enum ChatModel implements ChatModelDescription {
 		/**
 		 * o3 model snapshot.
 		 */
-		o3_2025_04_16("o3-2025-04-16"),
+		O3_2025_04_16("o3-2025-04-16"),
 
 		/**
 		 * <b>o1-preview</b> is trained with reinforcement learning to perform complex