docs: fix link for pk mobile readme

Author: CryptoTotalWar

docs/tutorials/polykey-mobile/README.md

@@ -4,6 +4,6 @@ import DocCardList from '@theme/DocCardList';
 
 [Polykey Mobile](https://github.com/MatrixAI/Polykey-Mobile) is the mobile application providing a graphical user interface for managing interactions with the Polykey network from your mobile device. It is still currently under development. As of now, there are no tutorials for Polykey Mobile.
 
-Follow our development on [GitHub](https://github.com/MatrixAI/Polykey-Desktop).
+Follow our development on [GitHub](https://github.com/MatrixAI/Polykey-Mobile).
 
 <DocCardList />