Update maintenance notice

README.md

@@ -1,5 +1,5 @@
 > [!WARNING]
-> PiVPN Is no longer maintained. please read more about it [here](https://github.com/pivpn/pivpn/releases/tag/v4.6.0)
+> PiVPN is maintained on a best-effort basis, please read more about it [here](https://github.com/pivpn/pivpn/releases/tag/v4.6.1). Previous announcement is [here](https://github.com/pivpn/pivpn/releases/tag/v4.6.0).
 
 ![Pivpn Banner](pivpnbanner.png)