fix: Correct temporary email logging format

config.py

@@ -131,7 +131,7 @@ class Config:
             logging.info(f"\033[32mIMAP收件箱目录: {self.imap_dir}\033[0m")
         if self.temp_mail != "null":
             logging.info(
-                f"\033[32m临时邮箱: {self.temp_mail}@{self.temp_mail_ext}\033[0m"
+                f"\033[32m临时邮箱: {self.temp_mail}{self.temp_mail_ext}\033[0m"
             )
         logging.info(f"\033[32m域名: {self.domain}\033[0m")