Fixes Sensei broken link

Issue: #3148

Author: Harshit933

README.md

@@ -54,7 +54,7 @@ LDK/`rust-lightning` is a generic library that allows you to build a Lightning
 node without needing to worry about getting all of the Lightning state machine,
 routing, and on-chain punishment code (and other chain interactions) exactly
 correct. Note that LDK isn't, in itself, a node. For an out-of-the-box Lightning
-node based on LDK, see [Sensei](https://l2.technology/sensei). However, if you
+node based on LDK, see [Sensei](https://github.com/L2-Technology/sensei). However, if you
 want to integrate Lightning with custom features such as your own chain sync,
 key management, data storage/backup logic, etc., LDK is likely your best option.
 Some `rust-lightning` utilities such as those in