Update prerequisites.mdx

Signed-off-by: CelloSerenity <[email protected]>

Author: CelloSerenity

docs/installation/prerequisites.mdx

@@ -22,7 +22,7 @@ To install SideStore, you will need:
 
 SideStore utilizes an on-device VPN which allows SideStore to communicate with internal services.
 
-1. Install the StosVPN app from the [Apple App Store](https://apps.apple.com/us/app/stosvpn/id6744003051). If StosVPN is unavailable, you can utilize the VPN present in StikDebug. If you live in the EU, install StikDebug via [AltStore PAL](https://altstore.io/download), otherwise install via the [Apple App Store](https://apps.apple.com/us/app/stikdebug/id6744045754). Note: you can't sideload VPNs on a free account.
+1. Install the StosVPN app from the [Apple App Store](https://apps.apple.com/us/app/stosvpn/id6744003051). If StosVPN is unavailable, you can utilize the VPN present in StikDebug. If you live in the EU, install StikDebug via [AltStore PAL](https://altstore.io/download) and [add the StikDebug Source](https://intradeus.github.io/http-protocol-redirector?r=altstore-pal://source?url=https://stikdebug.xyz/apps.json), otherwise install it via the [Apple App Store](https://apps.apple.com/us/app/stikdebug/id6744045754). Note: you can't sideload VPNs on a free account.
 2. Connect to the VPN. If you are prompted to "Allow VPN Configurations", tap 'Allow' and enter your passcode.
 
 This VPN is required to be turned on any time you wish to install, update, or refresh apps in SideStore.