Add transfer notice to README

Author: ammario

README.md

@@ -7,10 +7,16 @@ websocket is a minimal and idiomatic WebSocket library for Go.
 
 ## Install
 
+
 ```sh
 go get github.com/coder/websocket
 ```
 
+> [!NOTE]
+> Coder now maintains this project as explained in [this blog post.](https://coder.com/blog/websocket)
+> We're grateful to [nhooyr](https://github.com/nhooyr) for authoring and maintaining this project from
+> 2019 to 2024.
+
 ## Highlights
 
 - Minimal and idiomatic API