优化：论坛贴子编辑

src/pages/resourceManage/materielManage/comp/addEditModal/index.tsx

@@ -183,7 +183,7 @@ const AddEditModal: React.FC<propType> = (props) => {
           <Uploader
             listType={'picture-card'}
             fileUpload
-            fileLength={9}
+            fileLength={1}
             fileSize={10}
             fileType={['image/png', 'image/jpeg', 'image/jpg', 'image/gif', 'image/bmp']}
             onChange={(e) => {