OpenAI: unify path

Signed-off-by: lambochen <[email protected]>

Author: lambochen

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

@@ -36,7 +36,7 @@ public final class OpenAiApiConstants {
 
 	public static final String DEFAULT_AUDIO_TRANSLATION_PATH = "/v1/audio/translations";
 
-	public static final String DEFAULT_MODERATION_PATH = "v1/moderations";
+	public static final String DEFAULT_MODERATION_PATH = "/v1/moderations";
 
 	public static final String DEFAULT_EMBEDDINGS_PATH = "/v1/embeddings";