fix paths

Author: juliarobles

docs/docs/quickstart.mdx

@@ -42,12 +42,12 @@ To deploy the platform with recommended functionality, use the command below:
 helm upgrade --install opentwins ertis/OpenTwins -n opentwins --wait --dependency-update
 ```
 
-To modify the components to be deployed and connected during the installation, you can check the [installation via Helm](./installation/using-helm.md).
+To modify the components to be deployed and connected during the installation, you can check the [installation via Helm](./installation/using-helm.mdx).
 
 ### Configuration
 If you've correctly installed OpenTwins Helm using the default settings, all connections should be established. 
 The final step involves **configuring the platform interface plugin** by adding the addresses of the Eclipse Ditto nginx service and the Ditto Extended API component into the plugin's configuration section.
-Check the [installation documentation](./installation/using-helm.md#configuration) for more details.
+Check the [installation documentation](./installation/using-helm.mdx#configuration) for more details.
 
 
 ## Create your first digital twin