Update apps.md

clarkeash · web-flow · commit d4d1dad66d7d · 2020-11-14T19:02:44.000+01:00
diff --git a/doc/apps.md b/doc/apps.md
@@ -36,7 +36,7 @@ $repositories = $client->api('apps')->listRepositories(456);
 
 ### List repositories for a given installation and user
 
-```
+```php
 $repositories = $client->api('current_user')->repositoriesByInstallation(456);
 ```
 
