fix: login password validate

app/forms/users/login_form.rb

@@ -4,5 +4,5 @@ class Users::LoginForm
   attr_accessor :password, :login
 
   validates :login, presence: true
-  validates :password, presence: true, length: { minimum: 8, maximum: 16 }, format: { with: CustomRegexp::PASSWORD, message: "8~16位，支持字母数字和符号" }
+  validates :password, presence: true, length: { minimum: 6, maximum: 16 }, format: { with: CustomRegexp::PASSWORD, message: "6~16位，支持字母数字和符号" }
 end