Update src/store/writer.rs

Co-authored-by: Paul Masurel <paul@quickwit.io>

src/store/writer.rs

@@ -140,7 +140,7 @@ impl StoreWriter {
     /// of documents.
     pub fn store_bytes(&mut self, serialized_document: &[u8]) -> io::Result<()> {
         let doc_num_bytes = serialized_document.len();
-        VInt(doc_num_bytes as u64).serialize(&mut self.current_block)?;
+        VInt(doc_num_bytes as u64).serialize_into_vec(&mut self.current_block);
         self.current_block.extend_from_slice(serialized_document);
         self.num_docs_in_current_block += 1;
         self.check_flush_block()?;