fix: 告警说明文档读取问题

src/utils/execl-utils.ts

@@ -20,10 +20,11 @@ export const xlsxUrl = `${
  * });
  */
 export async function readLoalXlsx(id: string): Promise<Record<string, any>[]> {
-  let fileBolb = await (await fetch(`${xlsxUrl}/${id}.xlsx`)).arrayBuffer();
-  if (!fileBolb.byteLength) {
-    fileBolb = await (await fetch(`${xlsxUrl}/all.xlsx`)).arrayBuffer();
+  let result = await fetch(`${xlsxUrl}/${id}.xlsx`);
+  if (result.status !== 200) {
+    result = await fetch(`${xlsxUrl}/all.xlsx`);
   }
+  const fileBolb = await result.arrayBuffer();
   return readSheet(fileBolb, 0);
 }