更正update文本块接口

java/storlead-knowledge/storlead-knowledge-api/src/main/java/com/storlead/knowledge/api/ChunkController.java

@@ -93,13 +93,13 @@ public class ChunkController {
     public Result<Object> updateChunk(  @PathVariable String dataset_id,
                                         @PathVariable String document_id,
                                         @PathVariable String segment_id,
-                                        @RequestBody ChunkDTO request) throws JsonProcessingException {
+                                        @RequestBody String request) {
         String url = difyProperties.getBaseUrl()  + "datasets/"+ dataset_id +"/documents/"+document_id +"/segments/"+segment_id;
         return   httpService.post(
                 url,
-                Map.of(),
+                null,
                 "Bearer "+difyProperties.getDatasetApiKey(),
-                JacksonHolder.OBJECT_MAPPER.writeValueAsString(request),
+                request,
                 new TypeReference<>() {}
         );
     }