feat:url whitelist tutorial(Guovin#470)

Author: Guovin

docs/tutorial.md

@@ -58,7 +58,7 @@
 
 1. 创建文件
 2. 模板文件命名为 user_demo.txt
-3. 模板文件需要按照（频道分类,#genre#），（频道名称,频道接口）进行编写，注意是英文逗号。
+3. 模板文件需要按照（频道分类,#genre#），（频道名称,频道接口）进行编写，注意是英文逗号。如果需要将该接口设为白名单（不测速、保留在结果最前），可在地址后添加$!即可，例如http://xxx$!。后面也可以添加额外说明信息，如：http://xxx$!白名单接口
 4. 点击 Commit changes...进行保存
 
 ![创建user_demo.txt](./images/edit-user-demo.png '创建user_demo.txt')

docs/tutorial_en.md

@@ -55,7 +55,7 @@ When you click to confirm and create in step one, you will be automatically redi
 
 1. Create file
 2. Name the template file user_demo.txt
-3. The template file needs to be written in the format of (channel category, #genre#), (channel name, channel interface), note that it is an English comma.
+3. The template file needs to be written in the format of (channel category, #genre#), (channel name, channel interface), note that it is an English comma. If you need to set this interface as a whitelist (no speed testing, kept at the front of the results), simply add $! after the address. For example: http://xxx$!. Additional information can also be appended afterward, such as: http://xxx$! Whitelist interface.
 4. Click Commit changes... to save
 
 ![Create user_demo.txt](./images/edit-user-demo.png 'Create user_demo.txt')