[Model-download] Update to release notes main branch

Author: 14pankaj

microservices/model-download/docs/user-guide/release-notes.md

@@ -2,7 +2,7 @@
 
 ## Current Release
 
-## Version 1.1.0-rc1
+## Version 1.1.0
 
 **Release Date**: WW08 2026
 - Updated the OpenVINO™ plugin to support NPU for LLM models.