docs: PolyKey Desktop has no tutorials because it is not ready

Author: CryptoTotalWar

docs/tutorials/polykey-desktop/README.md

@@ -2,6 +2,8 @@ import DocCardList from '@theme/DocCardList';
 
 # Polykey Desktop
 
-[Polykey Desktop](https://github.com/MatrixAI/Polykey-Desktop)
+[Polykey Desktop](https://github.com/MatrixAI/Polykey-Desktop) is the desktop application providing a graphical user interface for interacting with the Polykey network. It is still currently under development. As of now, there are no tutorials for Polykey Desktop.
+
+Follow our development on [GitHub](https://github.com/MatrixAI/Polykey-Desktop).
 
 <DocCardList />