fix: group import filename

Author: fengkx

source/middlewares/get-file-link.ts

@@ -4,7 +4,7 @@ import { MContext, Next } from '../types/ctx';
 export default async (ctx: MContext, next: Next): Promise<void> => {
     const fileId = ctx.message.document.file_id;
     const fileName = ctx.message.document.file_name;
-    if (fileName.search(/(@\w+)|(-\d+)/) !== -1) {
+    if (fileName.search(/(^@\w+)|(^-\d+)/) !== -1) {
         const channelId = fileName.match(/(@\w+)|(-\d+)/)[0];
         try {
             ctx.state.chat = await ctx.telegram.getChat(channelId);