docs: remove backport net7 note

Author: Lulalaby

DisCatSharp.Extensions.Docs/articles/index.md

@@ -9,6 +9,6 @@ author: DisCatSharp Team
 You should be familiar with DisCatSharp and its concepts. If you're not, you can find the documentation [here](https://docs.dcs.aitsys.dev/articles/).
 
 ## Supported .NET Implementations
-DisCatSharp Extensions 3.0 and higher targets .NET 8 primary, supports .NET 9 and backports .NET 7.
+DisCatSharp Extensions 3.0 and higher targets .NET 9 primary and backports .NET 8.
 
 Once you're up and running, feel free to browse through the [API Documentation](/api/index.html)!