fix: update maintenance badge

README.md

@@ -5,7 +5,7 @@
 [![build](https://img.shields.io/github/actions/workflow/status/hoodie/notify-rust/ci.yml?branch=main)](https://github.com/hoodie/notify-rust/actions?query=workflow%3A"Continuous+Integration")
 [![Crates.io](https://img.shields.io/crates/d/notify-rust)](https://crates.io/crates/notify-rust)
 [![contributors](https://img.shields.io/github/contributors/hoodie/notify-rust)](https://github.com/hoodie/notify-rust/graphs/contributors)
-![maintenance](https://img.shields.io/maintenance/yes/2023)
+![maintenance](https://img.shields.io/maintenance/yes/2025)
 
 [![version](https://img.shields.io/crates/v/notify-rust)](https://crates.io/crates/notify-rust/)
 [![documentation](https://img.shields.io/badge/docs-latest-blue.svg)](https://docs.rs/notify-rust/)