[bot] AutoMerging: merge all upstream's changes:

* https://github.com/destan19/OpenAppFilter:
  Update README.md

README.md

@@ -1,8 +1,7 @@
 
 ## OAF(Open App Filter)  
 OAF is a parental control plug-in based on OpenWrt, which supports app filtering for games, videos, chats, downloads, such as Tiktok, Youtube, Telegram,etc.,and support self-defined app rules, you can lean more and download firmware by visiting [www.openappfilter.com](http://www.openappfilter.com) .
-### OpenWrt开发教程  
-www.ttcoder.cn  
+
 
 ### Preparation
 - Prepare a router that supports openwrt