Update maintenance badge year in README.md (#271)

Author: davidarroyo1234

README.md

@@ -1,6 +1,6 @@
 # 📱 Instagram Unfollowers
 
-[![Maintenance](https://img.shields.io/maintenance/yes/2025)](https://github.com/davidarroyo1234/InstagramUnfollowers)
+[![Maintenance](https://img.shields.io/maintenance/yes/2026)](https://github.com/davidarroyo1234/InstagramUnfollowers)
 
 A nifty tool that lets you see who doesn't follow you back on Instagram.  
 <u>Browser-based and requires no downloads or installations!</u>