Update README.md

Author: blackandred

README.md

@@ -1,6 +1,8 @@
 Backup Repository
 =================
 
+> NOTICE: Sadly, we no longer have power to maintain Backup Repository ecosystem as it grew up pretty big and we are not a full-time employeed development team. Feel free to maintain a fork.
+
 [![Coverage Status](https://coveralls.io/repos/github/riotkit-org/backup-repository/badge.svg?branch=main)](https://coveralls.io/github/riotkit-org/backup-repository?branch=main)
 [![Test](https://github.com/riotkit-org/backup-repository/actions/workflows/test.yaml/badge.svg)](https://github.com/riotkit-org/backup-repository/actions/workflows/test.yaml)
 [![Artifact Hub](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/riotkit-org)](https://artifacthub.io/packages/search?repo=riotkit-org)