fix(email): 修正发送评论回复通知的邮件参数格式

邮件发送接口的参数格式不正确，导致无法正常发送通知。调整了`to`和`from`字段的格式以匹配邮件服务的要求。

cwd-comments-api/src/utils/email.ts

@@ -84,8 +84,8 @@ export async function sendCommentReplyNotification(
   }
 
   await env.SEND_EMAIL.send({
-    to: [{ email: toEmail }],
-    from: { email: env.CF_FROM_EMAIL },
+    to: [toEmail],
+    from: env.CF_FROM_EMAIL,
     subject: `评论回复 - ${postTitle}`,
     html
   });