add caution for github users

README.md

@@ -3,6 +3,13 @@
 ![GitHub License](https://img.shields.io/github/license/tlinden/swayipc)
 [![GoDoc](https://godoc.org/github.com/tlinden/swayipc?status.svg)](https://godoc.org/github.com/tlinden/swayipc)
 
+> [!CAUTION]
+> This software is now being maintained on [Codeberg](https://codeberg.org/scip/swaycycle/).
+>
+> You may still use  the `github.com/tlinden/swayipc` module, but this
+> version here is no longer being maintained. To use the current version,
+> import `codeberg.org/scip/swayipc/v1`.
+
 # swayipc - go bindings to control sway and swayfx
 
 Package swayipc can be used to control [sway](https://swaywm.org/),