style: 优化github订阅创建时的文案问题

server/plugins/com.msgbyte.github/web/plugins/com.msgbyte.github/src/GroupSubscribePanel/AddGroupSubscribeModal.tsx

@@ -46,7 +46,7 @@ export const AddGroupSubscribeModal: React.FC<{
         type: 'text',
         name: 'repoName',
         label: Translate.repoName,
-        placeholder: 'msgbyte/tailchat',
+        placeholder: Translate.repoNamePlaceholder,
       },
       {
         type: 'custom',

server/plugins/com.msgbyte.github/web/plugins/com.msgbyte.github/src/translate.ts

@@ -37,6 +37,10 @@ export const Translate = {
     'zh-CN': '仓库名',
     'en-US': 'Repo Name',
   }),
+  repoNamePlaceholder: localTrans({
+    'zh-CN': '(示例: msgbyte/tailchat)',
+    'en-US': '(example: msgbyte/tailchat)',
+  }),
   textPanel: localTrans({
     'zh-CN': '文本频道',
     'en-US': 'Text Channel',