remove outdated apps, update links (#33)

* remove outdated apps, update links

* remove outdated apps, update links

Author: Drsheppard01

apps/concordium-desktop-wallet.md

@@ -2,7 +2,7 @@
 
  The latest stable AppImage of the official Concordium Dektop Wallet
 
- SITE: https://www.concordium.com/desktop-wallets
+ SITE: https://www.concordium.com/wallet
 
  | [Applications](https://portable-linux-apps.github.io/apps.html) | [Home](https://portable-linux-apps.github.io)
  | --- | --- |

apps/hey.md

@@ -4,7 +4,7 @@
 
  To remedy this, Topgrade detects which tools you use and runs the  appropriate commands to update them.
 
- ![gif](https://raw.githubusercontent.com/topgrade-rs/topgrade/master/doc/screenshot.gif)
+ ![gif](https://github.com/topgrade-rs/topgrade/blob/main/doc/topgrade_demo.gif)
 
  SITE: https://topgrade-rs.github.io