chore: add version 9 to breaking changes list (#3086)

Author: Tsvetomir-Hr

upgrade/breaking-changes/list.md

@@ -10,7 +10,7 @@ position: 0
 
 This article lists the releases of the Telerik UI for Blazor product that introduce breaking changes. You may want to go through it when [upgrading](slug:upgrade-tutorial) to see whether you are affected.
 
-
+* [9.0.0](slug:changes-in-9-0-0)
 * [8.0.0](slug:changes-in-8-0-0)
 * [7.0.0](slug:changes-in-7-0-0)
 * [6.0.0](slug:changes-in-6-0-0)