Fix: Custom delimiter does not take effect when document type is link (#2565)

Co-authored-by: 勤劳上班的卑微小张 <jiazhan.zhang@ggimage.com>

packages/service/core/dataset/collection/utils.ts

@@ -159,7 +159,8 @@ export const reloadCollectionChunks = async ({
   // split data
   const { chunks } = splitText2Chunks({
     text: newRawText,
-    chunkLen: col.chunkSize || 512
+    chunkLen: col.chunkSize || 512,
+    customReg: col.chunkSplitter ? [col.chunkSplitter] : [],
   });
 
   // insert to training queue