Fix formatting of deprecation notice in README

Author: Jakubk15

README.md

@@ -1,6 +1,6 @@
 ![](/assets/readme-banner.png)
 
-## ⚠️ This repository has been deprecated since November 15th, 2025. If you would like to use an updater system, please refer to [EternalCodeCommons](https://github.com/EternalCodeTeam/EternalCodeCommons)]
+## ⚠️ This repository has been deprecated since November 15th, 2025. If you would like to use an updater system, please refer to [EternalCodeCommons](https://github.com/EternalCodeTeam/EternalCodeCommons)
 
 # ✔ GitCheck
 GitCheck is a Java library that makes it easy to check for updates to a GitHub repository.