fix: broken links

Author: Bird87ZA

concepts/framework/in-app-purchases.md

@@ -41,8 +41,8 @@ The app server can use this token to validate active purchases and unlock relate
 
 Plugins are inherently less secure, as their open nature makes them more vulnerable to spoofing or tampering.
 
-<PageRef page="../../guides/plugins/apps/in-app-purchase" title="In-App purchases for Apps" />
-<PageRef page="../../guides/plugins/plugins/in-app-purchase" title="In-App purchases for Plugins" />
+<PageRef page="../../guides/plugins/apps/in-app-purchase/index.md" title="In-App purchases for Apps" />
+<PageRef page="../../guides/plugins/plugins/in-app-purchase/index.md" title="In-App purchases for Plugins" />
 
 ## Checkout Process
 

guides/plugins/apps/in-app-purchase/index.md

@@ -7,7 +7,7 @@ In-App Purchase is available since Shopware version 6.6.9.0
 In-App Purchases are a way to lock certain features behind a paywall within the same extension.
 This is useful for developers who want to offer a free version of their extension with limited features and a paid version with more features.
 
-<PageRef page="../../../concepts/framework/in-app-purchases.md" title="In-App purchases concept" />
+<PageRef page="../../../../concepts/framework/in-app-purchases.md" title="In-App purchases concept" />
 
 ## Allow users to buy an In-App Purchase
 

guides/plugins/plugins/in-app-purchase/index.md

@@ -8,7 +8,7 @@ In-App Purchases are a way to lock certain features behind a paywall within the
 This is useful for developers who want to offer a free version of their extension with limited features,
 and then offer a paid version with more features.
 
-<PageRef page="../../../concepts/framework/in-app-purchases.md" title="In-App purchases concept" />
+<PageRef page="../../../../concepts/framework/in-app-purchases.md" title="In-App purchases concept" />
 
 ## Allow users to buy an In-App Purchase