feat: add TITLE in worker for custom website title (#276)

vitepress-docs/docs/en/cli.md

@@ -74,6 +74,7 @@ node_compat = true
 # ]
 
 [vars]
+# TITLE = "Custom Title" # The title of the site
 PREFIX = "tmp" # The mailbox name prefix to be processed
 # If you want your site to be private, uncomment below and change your password
 # PASSWORDS = ["123", "456"]

vitepress-docs/docs/zh/guide/cli/worker.md

@@ -42,6 +42,7 @@ node_compat = true
 # ]
 
 [vars]
+# TITLE = "Custom Title" # 自定义网站标题
 PREFIX = "tmp" # 要处理的邮箱名称前缀，不需要后缀可配置为空字符串
 # 如果你想要你的网站私有，取消下面的注释，并修改密码
 # PASSWORDS = ["123", "456"]