docs: fix broken links

docs/admin-manual/install/README.md

@@ -35,6 +35,6 @@ If you are coming from **Airtime**, please follow the [Airtime migration guide](
 
 You can install LibreTime using the one of the following methods:
 
-- [:rocket: Using docker](./install-using-docker.md)
-- [:rocket: Using the installer](./install-using-the-installer.md)
+- [:rocket: Using docker](./install-using-docker.mdx)
+- [:rocket: Using the installer](./install-using-the-installer.mdx)
 - :construction: Using ansible

docs/admin-manual/install/migrate-from-airtime.md

@@ -17,7 +17,7 @@ To have a better understanding of the next steps, please read the following docu
 
 - [Upgrade documentation](./upgrade.md)
 - [Backup documentation](../backup.md)
-- [Install documentation](./install-using-the-installer.md)
+- [Install documentation](./install-using-the-installer.mdx)
 
 ## Make a backup
 
@@ -45,7 +45,7 @@ The path to your storage was defined during the installation process, the defaul
 
 ## Install
 
-Install LibreTime on a new system by [running the installer](./install-using-the-installer.md#run-the-installer), and **don't run the setup tasks**.
+Install LibreTime on a new system by [running the installer](./install-using-the-installer.mdx#run-the-installer), and **don't run the setup tasks**.
 
 ## Restore the Airtime backup
 

docs/admin-manual/tutorials/setup-liquidsoap-aac-streaming.md

@@ -14,7 +14,7 @@ Libretime is NOT compatible with Liquidsoap 2.x at the time of this writing. Fut
 
 :::info
 
-Lets assume you already [installed LibreTime using the native OS installer](../install/install-using-the-installer.md). Execute the following commands as the libretime user.
+Lets assume you already [installed LibreTime using the native OS installer](../install/install-using-the-installer.mdx). Execute the following commands as the libretime user.
 
 :::